Despite the fact that Darwinists really have very little evidence for their claims concerning the sedimentary rock layers, their nomenclature is plastered all over the books and articles and studies published concerning fossils and fossil rocks. This makes for some difficulty for Creation scientists because Flood Geology has far different ways of classifying the rock layers. Nevertheless, even dealing with Darwinist terminologies, Michael Oard has done a great job of presenting an overview of dinosaur fossils and tracks and explaining why the Noahic Flood remains the best explanation for the mass extinctions and preservation of billions of organisms. Now that the fossil record has become relatively robust, the lack of transitional forms has been ignored (perhaps out of frustration) and the primary focus for Naturalists is to find a coherent way to account for the catastrophic nature of the rock layers. I believe this article exposes such efforts as being wasted time and energy.
The article is long, but it is thorough and the citations are numerous. Most Darwinists are unaware of much of the material revealed here. There are still people who think the Coconino Sandstone formation was formed by a desert climate! Others seem unaware of the many sets of dinosaur "graveyards" which are configured as if laid down by a rapid flow of water and sediments. Others are unaware of the sheer numbers of dinosaur and amphibian tracks that seem to always be fleeing in a straight line and occasionally even represent animals running in water and being overcome by it. In any event, this rigorous treatment of the dinosaur extinction question is typical of the kind of research reviews Creation scientists are doing as they cull together the findings of Naturalists and separate the evidence from the narrative to get down to actual evidence that can be used to build the best possible models for the Flood event and post-Flood ice age period. The telling thing? This article is from 1997, so all of these facts have been known to science for 15 years. A follow up article will be coming down the pipe to bring new evidence to bear. Any dinosaurs depicted
IntroductionDinosaurs bring wonder to children and adults alike. That such great beasts once roamed the earth is hard to imagine. Even harder to imagine is that some dinosaurs such as Tyrannosaurus rex were probably giant killing machines (after the Fall, anyway). Of all the many questions related to dinosaurs, their disappearance from the earth is the most mysterious of all. (Their demise, of course, assumes that no dinosaurs are alive today, as some people believe, but which is beyond the scope of this review article.)
The mystery is heightened when one realises that the dinosaurs were well adapted to their environments and apparently had a worldwide distribution. Dinosaurs have been unearthed on every continent, including Antarctica.1,2 Their traces are even found on a few isolated oceanic islands, such as Spitsbergen3 and North Island, New Zealand.4
Besides Antarctica and Spitsbergen, dinosaurs have been dug up from other high latitude or inferred high palaeolatitude locations.5 For instance, they have been unearthed from the North Slope of Alaska near the Arctic Ocean.6-8 These high latitude discoveries have initiated many questions on whether dinosaurs were endotherms, ectotherms, or some combination in between; whether they migrated towards lower latitudes to avoid winter cold and darkness; or if they actually lived at these polar locations all year round.9 Polar dinosaurs have greatly perplexed uniformitarian scientists, as exemplified in the following comment by Michael Benton:
‘Should we now imagine dinosaurs as thermally insulated warm-blooded animals that ploughed through snowdrifts and scraped the ice off the ground to find food?’10
Dinosaur eggs, as well as nests, embryos and hatchlings, are now recognised from at least 199 locations around the world (Figure 2).17 A new discovery from Spain suggests a whopping 300,000 eggs packed into a rock volume of about 12,000 cubic metres.18,19 These rocks are probably within marine sandstone, so according to the uniformitarian paradigm the nests are automatically said to have been laid at the seashore. Despite all these eggs, embryos within the eggs are very rare.20 Characteristics of nests, eggs, and hatchlings in north central Montana, USA, have given rise to interesting interpretations of dinosaur maternal care.21,22
Why did the dinosaurs, as well as the marine reptiles and the flying reptiles, vanish from off the face of the earth? This is the burning question. Although many dinosaurs became extinct well before the End Cretaceous, nevertheless Zhao Zi-Kui indicates that dinosaur extinction still remains a major enigma of earth history, despite two promising theories:
‘Thus, the dinosaurs could quickly make use of the available ecological and evolutionary opportunities. However, they all vanished from the earth in the global events at the end of the Cretaceous. The cause poses a difficult question for which no ready answer is apparent.’23
Extinctions in generalDinosaurs, although creating the most interest, are but one group of animals that became extinct at the end of the Cretaceous (the geological timescale is used for communication purposes only and is not meant to endorse the geological column or time-scale). Extinctions have also occurred in all other periods of geological time. The subject of extinctions is rather controversial due to
the unknown time-stratigraphic range of most species,
the multiplication of names for the same organism, and
the unknown palaeobiogeographic distribution of many taxa.24
The most singular extinction event in the supposed history of life was not the End Cretaceous disappearance of the dinosaurs, but the End Permian demise of most groups of marine and terrestrial animals.27 The gravity of this End Permian event varies, depending upon the scientist doing the analysis and upon whether the datum is at the species, genus, or family level. One estimate is that 57 percent of marine families and 96 percent of marine species were decimated.28 Referring to Table 1, this extinction is attributed to cooling from an ‘ice age’ in combination with a marine regression. However, according to the uniformitarian paradigm the late Carboniferous and early Permian ‘ice age’ had ended millions of years before29 and should have caused a marine transgression due to melting ice, at least up until mid Permian time. Recent research is now trying to tie in the massive End Permian time extinctions with a giant meteorite impact, based on the finding of shocked quartz in Australia and Antarctica.30
Since geologists love cycles, five of the extinction events in Table 1 motivated David Raup and John Sepkoski to postulate a 26 million year extinction periodicity over the past 250 million years of geological time.31 One hypothesis for the cycle was that Nemesis, a twin star of the Sun, periodically disturbed the hypothetical Oort cloud of comets, some being ejected into the Solar System.32 Some of these comets then collided with the earth, resulting in the periodic mass extinctions. Nemesis has of course never been observed, neither has the Oort cloud. It is interesting that the 26 million year periodicity motivated other scientists to statistically scrutinise terrestrial impact structures, which supposedly ‘verified’ the 26 million year cycle.33 Many scientists now dispute the 26 million year periodicity, revealing in the process questionable assumptions in taxonomic analysis:
‘Patterson and Smith’s analysis produced the unexpected result that only a quarter of the families and family distributions recognised by Raup and Sepkoski are valid. The other three-quarters fell into six inappropriate groupings …’34The 26 million year cycle of impact craters is very likely an example of the reinforcement syndrome, in which an hypothesis tends to be supported by further research, when the support really is not there.35
|Extinction event||Suggested uniformitarian causes|
|1. Late Pleistocene||Climate warming and predation by man|
|2. Eocene/Oligocene Transition||Severe cooling, Antarctic glaciation, and ocean current changes|
|3. End Cretaceous||Bolide impact|
|4. Late Triassic||Increased rainfall and marine regression|
|5. End Permian||Severe cooling, glaciation, and marine regression|
|6. End Devonian||Cooling related to widespread anoxia of epeiric seas|
|7. Late Ordovician||A Gondwana glaciation|
|8. Late Cambrian Habitat||reduction probably caused by marine transgression|
|9. Late Precambrian Marine||regression, anoxia, sluggish ocean, biological stress, etc.|
|Table 1. Nine major mass extinctions and their suggested cause or causes.|
Theories of dinosaur extinctionNaturally, such a mystery as dinosaur extinction has spawned a wide range of theories, ranging from the plausible to the entertaining.36–41 In 1963, a geologist counted 46 theories, and many more have been added since then.42 Probably only the cause of the Pleistocene ice age has generated as many bewildering theories. (As of 1968, there were 60 theories for the cause of the ice age.43 In 1957, a prominent ice age specialist, J. K. Charlesworth, summarised ice age theories:
‘Pleistocene phenomena have produced an absolute riot of theories ranging “from the remotely possible to the mutually contradictory and the palpably inadequate.”’44)Some dinosaur extinction theories postulate that dinosaurs died from the cold, while others suggest the beasts died from the heat, or else it was too hot in the summer and too cold in the winter. One theory hypothesises that the climate became too wet, while another that the climate dried out to kill off the dinosaurs.
The dinosaurs could have starved to death or died from overeating. Or their extinction may have been caused by a nutritional problem, such as newly ‘evolved’ flowering plants not providing the proper nutritional balance. Or the flowering plants could have evolved poisons that killed the dinosaurs, as some theorise. A variant on the poisoning theme is that poisonous insects evolved and stung the dinosaurs into extinction. Others thought the water became poisonous with chemicals. Another ingenious twist is that butterflies and moths evolved and the larvae stripped the plants of leaves causing the herbivores to pass away, bringing on the extinction of the carnivores. Another theory suggests the herbivorous dinosaurs simply changed their eating habits to a less favourable diet, causing the demise of all the dinosaurs. Some postulate that too many carnivores decimated the herbivorous dinosaurs.
Astronomical or geophysical causes have often been invoked, for instance a change in the earth’s gravity, the axial tilt, or a reversal in the magnetic field. Some postulate a sudden bath in cosmic radiation. One theory, reinforced at one time by the iridium anomalies in sedimentary rocks, is that a supernova exploded near the earth.45 In this case the supernova would have increased the solar proton flux, which would have broken down the protective ozone layer, allowing ultraviolet radiation to zap the dinosaurs. Or the supernova explosion could have sharply increased cosmic rays.46 Another imaginative hypothesis claimed that intense volcanism spewed up large quantities of radioactive elements, so that the dinosaurs died of radiation poisoning.
In 1978, it was proposed that a spillover of cold brackish water from an isolated Arctic Ocean caused an ecological chain reaction, first killing off the pelagic plankton and ending with the terrestrial animals.47 Another terrestrial theory postulated that the land became too hilly. Many palaeontologists favour a regression of shallow seas, which suppressed dinosaur speciation rates and increased extinction rates. The mechanism for this vague hypothesis supposedly was due to competitive interchange between faunas and increased disease vectors.
A variety of theories suggest that either the pressure or some other component of the atmosphere changed to kill off the dinosaurs. One example is a decrease in carbon dioxide; another example is an increase in oxygen given off by too many plants. However, others have suggested oxygen decreased due to a decrease in plankton.48
A past popular favourite was that little mammals, waiting for ‘the great die-off ’ in order to evolve, advanced dinosaur extinction by eating dinosaur eggs. However, vertebrate palaeontologists generally believe the mammals were too small to have accomplished this feat.49
There is a large list of far-fetched to entertaining theories (some possibly suggested tongue-in-cheek), including extinction by parasites, slipped vertebral discs, hormonal disorders, shrinking brains, chronic constipation, over specialisation, inability to change, becoming too large, senility, hyperpituitarism, cataracts, racial senescence (they simply lived long enough), and social problems causing malformations of their bones during growth. Charig lists the following as the most outrageous: poison gases, volcanic gases, meteorites, comets, sunspots, God’s will, mass suicide and wars.50 Interestingly, volcanism, meteorite impacts and cometary collisions are now the major contenders, and I will argue that the real reason is an ‘act of God’ through the agency of the worldwide Genesis Flood. ‘Outrageous’ geological theories, for example, J. Harlen Bretz’s Spokane Flood as the origin of the channelled scabland in eastern Washington, USA, should not be so freely dismissed.
In spite of the recent dominance of the meteorite hypothesis, scientists continue to add new causes or subsidiary causes for the extinction of the dinosaurs. Some of these recent mechanisms are:
cancer triggered by huge bursts of neutrinos released by dying stars in the Milky
hypercanes, super hurricanes that could be triggered by meteorite impacts, causing
Revival of the meteorite extinction theoryEver since 1980, the meteorite hypothesis has swept to centre stage, and a large literature now surrounds it. Back in 1979, the meteorite hypothesis was considered outrageous by many geologists. The turnaround came with the discovery of an iridium (Ir) anomaly at the Cretaceous/ Tertiary (K/T) boundary.56 In thin clay layers (1 cm to several tens of centimetres thick) found at Gubbio, Italy, and at Stevns Klint, Denmark, the contained Ir concentrations were increased 30 and 160 times respectively above background levels. The earth’s crust is depleted in iridium and other platinum group elements, while meteorites are enriched in them. A 10 km diameter meteorite was said to have injected 60 times its mass in pulverised rock into the stratosphere, causing a cooling trend that wiped out about 50 percent of the biota, including all the dinosaurs. Conversely, others envision the impact caused a sudden, short-term temperature rise, instead of cooling from a ‘nuclear winter’-like mechanism.57 The sudden heating supposedly was caused by an oceanic impact which injected water into the stratosphere producing a ‘vapour canopy’ effect.
It did not take long to discover Ir anomalies at other K/T sites.58–60 Currently, there are 103 known K/T iridium anomalies from around the world, mostly in marine sediments either on the bottom of the ocean or on land.61 As for the frequency of meteorite bombardment, Eugene Shoemaker estimated that the earth probably was struck 5 to 10 times by meteorites that formed craters greater than 140 km in diameter.62 So an impact at the K/T boundary is not as outlandish within the uniformitarian paradigm as many first thought. Other scientists using computer climate models reinforced the scenario of disastrous climatological and ecological effects.63
The discovery of shocked quartz in eastern Montana, USA, in 1984,64 and at many other sites around the world65 since then, is considered further proof of the meteorite hypothesis. Shocked quartz differs from ordinary quartz, in that the crystal lattice has become compressed and deformed by pressure. Under a scanning electron microscope, the quartz exhibits planar striations in one or more directions on a crystal face.
Various other, more minor and equivocal evidence has been adduced in favour of the meteorite/asteroid extinction hypothesis, such as:
a palynological change from ferns to angiosperms in ‘continental’ deposits;66
the existence of microtektites,67 which are small, droplet-shaped blobs
of silica-rich glass;
soot-rich horizons supposedly from global wildfires caused by the heat of impact;68
various isotopic ratios;69
various other platinum group elements;70 and
the discovery of the ‘smoking gun’—the Chicxulub structure on
Mexico’s YucatÃ¡n Peninsula.71
The volcanic theoryThe triumph of the meteorite theory has come with much dissent, especially from palaeontologists who opted for a volcanic mechanism, often combined with marine regression, to explain the data.72–75 Even in spite of what seems like impressive confirmation of the meteorite theory and reinforced by the scientific press and news media, the dispute continues.76 If you read only the evidence for the impact theory, you would be impressed. However, if you read further the evidence for the volcanic theory, you would discover that the meteorite theory is not as well supported as it may seem.
Volcanic adherents point to the evidence of massive volcanism around the K/T boundary, for instance, the 1 million km3 of Deccan basalts in India and the extensive volcanism in western North America related to the Laramide Orogeny. To them, it is more logical that the dinosaurs died out gradually from all this volcanic activity.
As it turns out, iridium is also associated with volcanism, especially with dust injected into the atmosphere from basaltic extrusions.77 For instance, the fine airborne particles above an Hawaiian basaltic eruption were found to be highly enriched in iridium, much higher than in the K/T boundary clays at Gubbio and Stevns Klint.78,79 High iridium has also been associated with other volcanic eruptions and found within volcanic dust bands in the Antarctic ice cores. This fine material is of similar particle size as the K/T boundary clay.
Even shocked quartz has been associated with volcanism.80–82 Impact supporters counter that this shocked quartz is only weakly deformed compared with the K/T boundary shocked quartz, and that shocked quartz is associated with known impact craters as well as nuclear bomb test sites.83,84 However, Officer and Page argue that shocked grains are not found at some K/T boundary clays, and some shocked quartz grains are too large to have been transported far by the atmospheric winds.85 Officer adds that evidence of high-pressure shock is now found within rocks formed by explosions within volcanoes.86
Many other arguments are brought forth that favour the volcanic theory and/or are inimical to the meteorite theory, such as:
various elemental ratios, especially arsenic and antimony to iridium;87
iridium spread over too thick a vertical interval at the K/T boundary, which supposedly
would represent hundreds of thousands of years;88–91
clays above and below the K/T boundary not much different from the K/T boundary
survival of some environmentally sensitive plants and animals that should have gone
extinct,93 such as frogs, tropical plants94,95 and marine
plants that require uninterrupted sunlight;96,97
iridium spikes and shocked quartz at many other geological times;98–105
many extinctions well before the K/T boundary;106–108
many missing K/T intervals;109
the new discovery of polar dinosaurs that supposedly could withstand periods of
cold and darkness;110,111
much Cretaceous clay or shale of volcanic origin in North America;112
no statistical support for a sudden extinction of dinosaurs;113 and
the possibility that the Chicxulub structure is not of impact origin.114
Adherents to the volcanic hypothesis offer good counter arguments to all the arguments used in support of an impact. However, impact enthusiasts counter all the volcanic arguments. There is evidence both in favour of and against each hypothesis.
The process of paradigm change in scienceThe dinosaur extinction controversy has revealed how a particular subfield reacted to a paradigm change. Before 1980, practically all scientists were strongly biased against the meteorite hypothesis. This strong bent was mostly due to the uniformitarian assumption of historical geology:
‘Geological sciences have undergone a major shift in paradigms. For two centuries, the tenet of uniformitarianism, encapsulated in the phrase “the present is the key to the past”, was the skeleton upon which the history of the Earth was constructed.’119The meteorite hypothesis severely challenged the uniformitarian assumption.120 But, the impact enthusiasts had chemical data, instead of speculation. The iridium anomalies could not only be observed, but could be further tested at other K/T sites. The finding of iridium spikes at other K/T boundaries convinced most scientists, although at the time the geochemistry of iridium was poorly known, and still is poorly known in a marine environment.121 Eventually, meteorite impacts came to be viewed as part of the uniformitarianism paradigm after all.
Thus the meteorite theory was quickly supported and built up by the scientific press, especially by the journals Science and Nature. Then the popular press accepted it as fact, followed by most intellectuals.122 The only group of scientists that were not persuaded were the palaeontologists, except for those who advocated punctuated equilibrium, since the idea of impacts fits nicely into their theory. The palaeontologists had already worked out the order and timing of dinosaur palaeonecrology, and it was a slow evolutionary birth and death. They also did not like ‘outsiders’ such as ‘alien’ physicists (Luis Alvarez was a famous physicist who had received the Nobel prize) messing around in their speciality.123,124 Palaeontologists mostly favour the volcanic theory with marine regression.
So, before 1980 scientific bias was against the meteorite theory, but afterwards it was against all other theories. Scientists, nowadays, barely consider the palaeontologists’ arguments, many of them quite good from the uniformitarian standpoint. They simply believe the iridium anomalies and the shocked quartz grains prove the meteorite theory.
An overview of the controversy shows that whether a person accepted or rejected the meteorite theory was greatly preconditioned by his institution of higher learning and his scientific discipline.125 The peer pressure to conform to the preconceived ideas of one’s institution is strong, as Stephen Jay Gould admits:
‘I think orthodoxy is enormously supported. In fact, I would make an argument—and I think that anyone who argues against this is not being quite honest—that institutions, universities in particular, are very conservative places. Their function is not—despite lip service—to generate radically new ideas. There’s just too much operating in tenure systems and granting systems, in judgmental systems—usually older upon younger people [with] the pretenure needs to conform.’126Such strong peer pressure results in what is called by many others a ‘bandwagon effect’,127 another name for the reinforcement syndrome. William Glen explains:
‘The “bandwagon effect”, exacerbated by the rapid pace of the mass-extinction debates, was strongly in evidence in this study; it was also documented in vivo in studies of the accretionary-terrain research program …’128Biases were so strong that scientists resorted to many unscientific ploys to get their personal way, such as verbally attacking one another; using polemics to push their preferences, sometimes using outdated data; refusing to publish key data; and refusing grants for research they did not agree with.129,130 An after-the-fact study by William Glen indicated that few, laymen and scientists alike, really knew much about the issue.131 This is a sad state of affairs within science—it is no different when it comes to the creation/evolution controversy.
Evidence the dinosaurs died in a global floodDespite the popularity of the meteorite theory, many scientists believe the extinction of the dinosaurs has not been solved, or else that the meteorite theory needs a secondary, boosting mechanism. The extinction of the dinosaurs is still a major mystery. Gregory Paul exclaims:
‘The history of the dinosaurs is marked by remarkable success and stability during the Mesozoic. Far from being inherently vulnerable, the dinosaurs survived in spite of repeated changes in sea level and climate, enormous volcanic eruptions, and great impacts. Indeed, the dinosaurs’ fecundity makes it hard to see how such resilient animals could ever have been killed off. The extinction of the dinosaurs was probably not part of the normal course of evolutionary fluctuations, nor was it just another result of random extraterrestrial disruptions. Instead, it remains one of the most extraordinary and inexplicable events in Earth history.’132Could the reason the extinction of the dinosaurs remains such a major mystery be because of the uniformitarian bias within historical geology?
A watery cataclysm and dinosaur graveyardsFor most creationists, the extinction of the dinosaurs, as well as other extinctions, is not a mystery. In fact, the extinction of the dinosaurs and many other creatures has an easy answer—they simply died in the Genesis Flood (except those dinosaurs likely taken on the Ark, which probably died soon after the Flood). Genesis 7:21, 22 states:
‘And all flesh that moved on the earth perished, birds and cattle and beasts and every swarming thing that swarms upon the earth, and all mankind; of all that was on the dry land, all in whose nostrils was the breath of the spirit of life, died.’Although there are still many unknowns associated with the observed fossil data on dinosaurs, and the information that is available is often incomplete and interpreted within the evolutionary/uniformitarian paradigm, much of what is known so far fits quite well within the Flood paradigm.
The most obvious aspect of dinosaur fossils is that most dinosaurs must have been buried rapidly in water. Alternately, the dinosaurs could also have been entombed in giant mass flows. Based on the random mixing of charcoalised wood with sand found in Colorado and northeastern Wyoming, Edmond Holroyd provides evidence for at least region-wide catastrophic debris flows associated with dinosaur remains.133–135
Furthermore, after burial fossilisation must have proceeded rapidly under special conditions in which minerals moving through the saturated sediments replaced the organic matter. Therefore, it is no surprise that water is closely associated with the burial and fossilisation of the dinosaurs. Clemens states that organisms must be buried rapidly by rare (in his mind 100-year or 500-year events) floods in order to be preserved as fossils.136 The largest dinosaurs must have been buried by even ‘rarer’ floods.
A sizeable number of dinosaurs were entombed in obvious marine sediments.137–139 In assumed terrestrial sediments (the equivocal environmental designation of a terrestrial environment will be briefly discussed later), mainstream scientists commonly interpret the action of water as ‘fluvial’. For diluvialists, the dinosaurs could have been buried either by sheet flow or channelised flow; either one is possible in a global Flood depending upon many variables.
The Montana State Fossil is the Duck Billed Dinosaur - Maiasaura peeblesorum
Dinosaurs are often found in large bone-beds or dinosaur graveyards, where many dinosaur bones are packed together. This provides evidence for at least catastrophic local floods.140–142 A few of these bone-beds contain thousands of dinosaurs and indicate catastrophic action. Probably the largest bone-bed in the world is located in north-central Montana, USA. Based on outcrops, an extrapolated estimate was made for 10,000 duckbill dinosaurs entombed in a thin layer measuring 2 km east-west and 0.5 km north-south.143,144 The bones are disarticulated and disassociated, and are orientated east-west. However, a few bones were standing upright, indicating some type of debris flow.145 Moreover, there are no young juveniles or babies in this bone-bed, and the bones are all from one species of dinosaur. Horner and Gorman describe the bone-bed as follows:
‘How could any mud slide, no matter how catastrophic, have the force to take a two- or three-ton animal that had just died and smash it around so much that its femur—still embedded in the flesh of its thigh—split lengthwise?’146A cataclysmic event obviously is implied.
Another bone-bed containing thousands of duckbill dinosaurs, mostly in a single layer, is found in north-eastern Wyoming.147 Over 90 smaller bone-beds make up the huge deposit in Dinosaur Provincial Park, Alberta, Canada.148–150 Dinosaur National Monument in Vernal, Utah, USA, is world famous for its display of a water-laid jumble of disarticulated dinosaur bones.151 Another well-known bone-bed, mostly of large carnivores, is Cleveland-Lloyd Dinosaur Quarry in central Utah.152 Colbert described the stacked dinosaur bones in Howe Quarry, Wyoming, USA as being ‘… piled in like logs in a jam.’153 Robert Bakker can’t help but think of a cataclysm when viewing the dinosaur graveyard at Como Bluff, Wyoming:
‘Anyone who cherishes notions that evolution is always slow and continuous will be shaken out of his beliefs by Breakfast Bench [Como Bluff] and the other geological markers of cataclysm.’154There are many other dinosaur graveyards in western North America, practically all, if not all, indicating catastrophic burial by water or aqueous slurries.
Dinosaur graveyards are not found just in the western United States, but worldwide. One of the first graveyards discovered was an Iguanodon graveyard in Belgium.155 A new sauropod graveyard has been discovered in Niger, Africa. This graveyard is dated as ‘Cretaceous’, even though the dinosaurs closely resemble ‘Jurassic’ dinosaurs of western North America and are dissimilar to dinosaurs from South America, which was expected according to the theory of plate tectonics.156 A dinosaur graveyard of well preserved, articulated dinosaurs is now being excavated at Dashanpu, China.157
Another dinosaur graveyard that has recently made the scientific news is in Mongolia, also known for its many dinosaur eggs. This is one of the few graveyards that some scientists believe was buried, not by water, but by ‘catastrophic’ sandstorms.158,159 Just recently a ‘brooding’ oviraptorid was found on top of fossilised eggs in Mongolia.160 David Weishampel says that what these dinosaurs ate in the desert is a problem. Moreover, the unique preservation of a brooding dinosaur
‘… owes a great deal to rapid death and burial in what must have been a powerful sandstorm, so sudden that we are left with the impression of an animal freeze framed in the act of nest brooding.’161It is doubtful a sandstorm could freeze-frame a brooding dinosaur. Usually any little disturbance will cause an animal to leave its eggs. There is the added question of how the dinosaurs are to be fossilised in a desert. It is more likely this powerful sandstorm was a ‘giant watery sandwave’ in a catastrophic flood.
Similar to the huge bone-bed in Montana,162,163 many of these dinosaur graveyards contain only one or mostly one type of dinosaur.164 Practically all the bones in these monospecific bone-beds are disarticulated and broken.165 Furthermore, babies and young juveniles are not only missing from monospecific bone-beds, but are extremely rare as fossils anywhere:
‘Except for nesting horizons, baby dinosaur remains are extremely rare in the fossil record, suggesting that most, if not all, baby dinosaur mortality occurred in the nesting area.’166Since dinosaurs lay many eggs, based on the number of eggs found in nests and clutches, and because infant mortality is normally high in animals, there should be many more fossils of babies and young juveniles than older juveniles and adults. In referring to dinosaur fossils worldwide, Horner and Gorman state:
‘As succeeding years yielded no other major finds of baby dinosaurs, the question grew in importance. If you think about it, … more dinosaurs should have died young than died old; that’s what happens with most animals. And the high infant mortality should have produced a lot of fossils over the course of 140 million years—a lot of fossils that had never been found.’167The pervasive lack of very young dinosaurs and the occasional monospecific bone-beds of broken and disarticulate bones is most unusual. Some type of herding behaviour is normally invoked to explain monospecific bone-beds, although the stratigraphic character of some bone-beds does not favour this hypothesis. The lack of young juveniles in the monospecific bone-beds is perplexing, because young dinosaurs should have accompanied older dinosaurs in a herd, as observed in herds of animals today. The character of these bone-beds has given rise to a number of speculative theories, including local catastrophes. One would expect that local catastrophes, such as a flash flood or a volcanic eruption, would entomb more than just one type of animal.
Could these monospecific bone-beds containing older juveniles and adults provide further evidence of a unique watery catastrophe? One would surmise that during the initial onslaught of the Genesis Flood, adult and older juveniles would have been better able to flee the encroaching Flood waters. Dinosaurs of the same species may then have herded up, when normally they do not, only to be later buried together. Herding behaviour during times of stress is observed today among elk during cold, stormy weather; cattle before earthquakes; and many other species. The herding in this case would have nothing to do with ‘gregarious behaviour’ as some evolutionists surmise. Is it possible the reason for the rarity of baby dinosaurs outside nesting areas is because they could not keep up with the fleeing herd and perished quickly. Their bones were not fossilised probably because they were too fragile.
The existence and characteristics of dinosaur graveyards not only provide strong support for the Genesis Flood, but also tell us a few details of what occurred during that great cataclysm. For instance, some bone-beds, especially those in Montana and southern Alberta, show signs of exposure on land for a while following death. This is indicated by the remains of carnivorous dinosaur teeth, and only teeth, found among the bones, as well as tooth marks incised onto the bones.168–171 In other words, these bone-beds were scavenged, which has given rise to the idea that T. rex was just a scavenger. Since the bone-beds are lying on thousands of metres of Flood sediments, it seems reasonable that the Flood sediments became temporarily exposed during the Flood.172 Flood sediments could be exposed by either tectonic uplift or the falling of sea level due to the dynamics of ocean currents on a relatively shallow, flooded continent.173
Was T-Rex primarily a scavenger?
Dinosaurs fleeing the encroaching flood watersDinosaur tracks also provide more details on unusual conditions during their formation. The importance of dinosaur tracks is that they represent live animals, so that in a Flood model, the tracks were made within the first 150 days of the Flood.174,175 In the western United States, billions of dinosaur tracks have recently been discovered.176–178 Of special note are the megatracksites. One megatracksite in south-east Utah is on the upper boundary of the Entrada Sandstone, a supposedly desert sandstone. All the tracks are from a fairly large, carnivorous theropod. It is indeed strange that one type of dinosaur lived in a large area of an alleged desert. What were they supposed to eat in a desert? The evidence could be better interpreted as a group of theropods embarking on a temporarily exposed sandy surface during the Flood. Since tracks must be buried rapidly within a matter of days or weeks to be reserved,179 the sandy exposure was brief, followed by another depositional event.
A ‘dinosaur freeway’ has been discovered that stretches from north-east New Mexico to north-west Colorado. The tracks are generally of two types and are found on multiple stratigraphic levels that supposedly span several million years. Since the strata containing the tracks are probably conformable, it does not seem reasonable that only two types of dinosaurs used this ‘freeway’ over several millions of years. It is more reasonable that dinosaurs found a linear strip of land (or a series of shoals separated by shallow water) during the Flood while the sea level was oscillating and sediments were being deposited.
There are also a number of features of the tracks that not only are better understood within a diluvial model, but also tell us some of the unique events that occurred during the Flood. First, the tracks are practically always found on bedding planes,180 generally capping sedimentary units, which suggests a cycle of sedimentation during the Flood followed by a brief exposure above the water. Why wouldn’t the tracks be found throughout the beds if the sediments were deposited slowly over long periods of time?
Second, the lack of relief on the track-bearing strata181 indicates a rapid sedimentation event forming flat strata over a huge area. Otherwise, erosion over millions of years would have produced at least hilly topography and, therefore, tracks would traverse up and down hills.
The dinosaur-bearing Morrison Formation in the western United States (assuming all the many outcrops are time equivalent, which is questionable) represents what must have been a thin, flat plain a little above sea level. This plain covered 1,800,000 km2 from central Utah east to central Kansas, and from central New Mexico north to the Canadian border. The description of this Morrison ‘peneplain’ seems unreasonable:
‘The enormous area covered by Morrison sediments and the general thinness of the sedimentary sheet (being in most areas less than 100m in thickness) indicate that the sediments were distributed by widespread, flowing water.’182I can believe the widespread flowing water part, but did this flowing water excavate channels and valleys or create unconformities over a long period of time? The evidence for fluvial action is almost nonexistent:
‘Given the flat surface over which the Morrison was deposited … the absence of evidence for major single channel systems. Lack of initial valley incision into the surface left by the retreating seas, and the absence of unconformities within the Morrison …’183How can sediments be deposited thinly and evenly by rivers over a huge, flat surface with little slope without leaving significant channels? Such a flat plain containing both dinosaur tracks and remains is most unusual: ‘Nothing on earth today closely resembles the environment of the Morrison Formation.’184 Indeed, the observations of the ‘Morrison Formation’ bear striking evidence for catastrophic sheet flow, and not slow processes over millions of years.
Third, unusual, stressful conditions are also indicated by the fact that practically all trackways are straight.185 Lockley and Hunt state: ‘First, the sauropod was changing direction, turning to the right, a phenomenon rarely recorded in trackways.’186 Any deer or elk hunter knows that land animals frequently meander, especially while looking for food. Straight tracks are usually made when the animal is in a hurry, escaping a predator or a hunter, or rapidly migrating. Even in these situations, the trackways will sometimes curve or meander a little. The fact that practically all dinosaur trackways are straight strongly favours animals desperately trying to escape some catastrophe. The worldwide extent of these straight dinosaur trackways provides evidence for a cataclysm of global proportions.
Fourth, there are very few tracks of babies or juveniles.187,188 Coombs states:
‘As with bones, footprints of juvenile dinosaurs are quite rare … but this apparent scarcity may be in part an artifact of taxonomic bias.’189Regarding this claim of taxonomic bias, it is interesting that 50 percent of the elephant tracks from Amboseli National Park, Africa, were made by juveniles.190 Although elephants probably grow much slower than dinosaurs grew, and it can be difficult recognising a small track, dinosaurs are expected to have produced many more babies than elephants. So the reasons for the rarity of tracks of both babies and juveniles is not in accord with observations from the modern world, and hence it is against the uniformitarian principle that guides geological thought. The lack of tracks of young dinosaurs fits better into the Flood model, in which babies and juveniles were less able to flee the encroaching Flood waters and hence were unable to make too many tracks.
Fifth, another uniformitarian puzzle that is better explained within a Flood paradigm is the nearly complete absence of tracks of stegosaurs, ankylosaurs and ceratopsians, although they are certainly heavy enough to make tracks and their skeletal remains are common.191 Their thick armour and large bony plates suggest they were poor swimmers (in the track record, there is evidence of swimming dinosaurs and dinosaurs making tracks in shallow water192–194) and so they probably succumbed to the first inundation of their habitat.
In summary, all these unusual characteristics of dinosaur tracks do not fit into the uniformitarian paradigm of slow, gradual processes over millions of years. The evidence fits better a time of worldwide stress on dinosaurs trying to escape rising Flood waters. Since the tracks were made on hundreds to thousands of metres of Flood sediments, the evidence, as with bone-beds, indicates briefly exposed sediments or shallow water during the period of rising Flood waters.195 Track layers on more than one bedding plane represent brief exposures during a generally, continuous sedimentation event. The oscillations in local sea level would have been caused by local or distant tectonic events, tides, the dynamics of the Flood currents,196 tsunamis, etc.
Can dinosaur nests, eggs, and babies be explained within the Flood?The hypothesis of exposed Flood sediments during the early stages of the Flood is further supported by dinosaur bone-beds and tracks. It is expected from this hypothesis that pregnant female dinosaurs would have laid eggs on these temporary refuges. So, the finding of fossilised dinosaur eggs, sometimes in nests, which have recently been discovered in many parts of the world,197 is not unexpected. However, of the thousands of fossilised dinosaur eggs discovered, only several contain embryos,198 and most of these have been discovered in north-central Montana and southern Alberta.199–201
The famed Egg Mountain is not far from Glacier National Park
Several features of the nests, eggs, and babies appear to contradict the above Flood model; it seems as if too much time was required for all the indicated dinosaur activity.202–204 For example, at a few locations, eggs have been found at two or three stratigraphic horizons, for instance, at three levels within a 3 m vertical section on Egg Mountain.205 It also has been reported that 15 baby Maiasaurs, found in and around a nest 1 km north of Egg Mountain, north-central Montana, had grown for a while.
Before discussing this subject, the reader must be aware of the many unknowns associated with dinosaur eggs, which are subject to variable interpretation by mainstream scientists. Much of the detailed information has not been published. What at first may seem contradictory to a Flood model, may be shown not to be discrepant with further data. For instance, the 15 Maiasaur babies believed to have partially grown had worn teeth, some teeth three-quarters worn.206 At first glance, these worn teeth suggest the babies had fed for a relatively long period with the help of attendant mother dinosaurs. Garner states in referring to these worn teeth: ‘It is difficult to see how this sequence of events can be accommodated within the year of the Flood.’207 An alternative explanation is that the babies wore down their teeth while in the eggs and need not represent a long time of feeding. Based on the analysis of embryos near the Montana/Alberta border, Horner and Currie have concluded that embryos ground their teeth while still in the egg.208,209 (For the baby dinosaurs, worn teeth would have been no problem, since the teeth would have been simply replaced by new teeth.) Therefore, data on dinosaur eggs that at first seem inimical, may still be explained within a Flood model after further information is published.210,211
With the above example in mind, let us take a cursory view of Egg Mountain and vicinity. In north-central Montana and southern Alberta, there are several claims for nests, eggs and babies at multiple stratigraphic levels. However, in one instance the ‘different levels’ are many tens of kilometres apart.212,213 Since outcrops are isolated, the stratigraphy could easily be a little confused, due to facies changes or erosion that could have stripped more strata from one area than the other. In these cases, the eggs could be at the same time horizon.
On Egg Mountain, it was earlier published that eggs of hypsilophodont dinosaurs, Orodromeus makelai, were laid on three separate horizons within a 3 m thick vertical section. The eggs were half embedded in limestone layers between mudstone.214 Just having eggs at different stratigraphic levels is really not a problem in a Flood paradigm, in which portions of exposed land were periodically inundated.215 (It would be the same mechanism for the formation of multiple dinosaur track layers.) For example, turtles lay their eggs within hours in beach sand and then leave them. Conceivably, a fluctuating sea level could bury their eggs with more sand, and then re-expose the beach for more turtles to lay their eggs soon after the first group.216
However, palaeontologists believe that many of the eggs hatched. Support for this argument comes from the observation that many eggs have broken tops, and that 20 to 25 juveniles of various sizes were found within the nesting area on the horizons.217 Garner accepts this evidence at face value, concluding that a long period of time was required:
‘Thus nest construction, egg-laying and nurture of juveniles occurred at this locality three times. If one cycle of this sort is difficult to fit into the Flood year, the establishment of three successive nesting colonies one after the other surely strains the imagination, notwithstanding that the growth of baby dinosaurs was rapid.’218Actually, nests on Egg Mountain are rare; the eggs were mostly laid in a spiral on limestone with the pointed end down.219,220
There is new information and several observations that suggest that there is more to the story of what happened on Egg Mountain. First, there is some question on the number of horizons with anywhere from two to four suggested.
Second, the dinosaur eggs are no longer considered hypsilophodonts, but the theropod Troödon.221,222 This mistake was easy to make at the time since there was little skeletal material of Troödon and the bones of each are similar in many ways. There are eggs from a second type of dinosaur called? Troödon, which is not Troödon but from an unknown species. The 20 to 25 partial dinosaur skeletons at Egg Mountain are still considered Orodromeus, but they had not been hatched from the egg clutches, which are now Troödon eggs.
Third, the eggs may or may not have hatched. Just because the tops of many eggs were broken, does not necessarily mean the dinosaurs hatched. There are other possible explanations for this observation. Broken egg tops could have been caused by erosion from the next sediment layer or by compaction of the sediments. The tops of the eggs could have been broken by scavengers, for which there is abundant evidence in the area. There are fossils of small mammals, varanid lizards, pterosaurs and other types of dinosaurs at Egg Mountain.223–226 Troödon teeth are abundant at Egg Mountain.227 Troödon teeth are commonly associated with eggs at other sites of north-central Montana and southern Alberta.228,229 Could Troödon have cannibalised its own eggs on Egg Mountain, as is suggested for Coelophysis from the dinosaur graveyard at Ghost Ranch, New Mexico?230 Teeth of Albertosaurus, very similar to T. rex, also are found at Egg Mountain.231 Skeletons of 20 to 25 young dinosaurs are scattered among the eggs.232 Could they have scavenged the eggs? All this evidence suggests the eggs may have been scavenged after being laid, which need not take a long period of time on exposed land during the Flood.
Although the stratigraphy of the Maiasaur nesting area, 1 km north of Egg Mountain, is confused due to a high degree of lateral variability,233 three stratigraphic levels are claimed.234 Eggs are believed to have been laid at the top and bottom horizons, but not vertically above each other. Local erosion or soft sediments while the sediments were briefly exposed during the Flood could account for eggs on two of three stratigraphic horizons. In other words, it is possible that the dinosaurs laid eggs on a surface that cuts through the stratigraphy.235
One horizon contains eight closely-spaced ‘nests’, two that contained hatched baby dinosaurs. This is the horizon where 15 babies were found associated with a nest-like structure, 11 babies inside and four around the perimeter. The skeletons are 1m long. The ones in the ‘nest’ were disarticulated and jumbled together, a rather unusual condition for babies that supposedly died in a ‘nest’. One of the other eight ‘nests’ contained babies only 0.5 m long. Babies 0.5 m long were also found outside the ‘nests’.236 So, it appears that the 1 m long babies in the ‘nest’ grew for a while, suggesting mothering dinosaurs. Horner believes they grew rapidly and reached 1 m in length in about one month. It is possible that during the first 150 days of the Flood the Maiasaurs laid eggs and that the babies hatched and grew to 1 m long.
However, the idea of mothering dinosaurs for altricial babies has recently been challenged.237 If this claim is true, the mothers did not need to care for their young. Then what were the 15 babies each 1 m long doing in and around one of the ‘nests’? If eight duckbill dinosaurs made nests at the same time, which the evidence suggests, why are some babies only 0.5 m long and some 1 m long? Is it possible that multiple-sized babies were hatched at the same time? Are the claimed nests really nests made by mothering duckbill dinosaurs? They appear to be so, but other explanations are possible, especially in view of the possibility that baby Maiasaurs were precocial. At this point, whether the baby Maiasaurs were precocial or altricial is controversial. There are still too many unknowns to answer these questions.
There are several other indications of unusual, stressful conditions associated with fossilised dinosaur eggs. However, not enough study has been devoted to these conditions to know whether these were general or isolated occurrences. I will only briefly mention them. There are a number of reports of extremely thin egg shells.238–240 Pathological eggs, especially with multiple shell layers, have also been reported.241–245
Pathological eggs are rather rare in western North America compared to other areas of the world.246 It is rather strange that of the thousands of eggs recently discovered, embryos within the eggs are extremely rare.247,248 Palaeontologists believe the reason for this rarity is because the egg contents are not preserved:
‘Fossil experts think that normally egg contents leak, or decompose until the bones dissolve, or are eaten by predator dinosaurs before fossils are formed.’249Further data may indicate whether the above observations of fossilised dinosaur eggs are general or rare. If general, they would indicate unusual conditions; if rare, they probably would be the result of chance.
Volcanoes and meteorites during the FloodThe adherents of the meteorite theory and the volcanic theory for the demise of the dinosaurs possess both supportive and contrary data. The contrary data indicate that neither mechanism is the full story.
Creationists expect the Flood to have been a volcanic, tectonic, and hydrological cataclysm. Both submarine and subaerial volcanism is expected, and indeed there is abundant evidence for volcanism in both Precambrian250and Phanerozoic251 sedimentary rocks. In Montana, Wyoming and southern Alberta, the dinosaur-bearing beds contain copious amounts of volcanic material. So volcanism could easily be associated with the demise of the dinosaurs during the Flood, but not the main cause.
However, it is very likely that meteorite impacts also occurred during the Flood. Jeremy Auldaney suggests that impacts triggered the Flood.252,253 Carl Froede and Don deYoung propose that a planet broke up between Mars and Jupiter, based on the Titius-Bode relationship. The debris from this breakup was responsible for the cratering observed in the Solar System, with most impacts on earth occurring during the Flood.254 These authors are probably correct, since both the pre-Flood and post-Flood time-frames are expected to have been times of relative geological quiet.255 Furthermore, there are around 150 probable impact craters now known on earth.256 Most of the impact craters are dated between 1 million and 1 billion years.257 One would expect that most of these 150 impacts occurred during the Flood, especially if the Flood/post-Flood boundary is generally in the late Cainozoic of the uniformitarian timescale.258–260 The reason for this deduction is that erosion since the Flood has been slight, especially in areas not glaciated.261 An impact within the Flood is expected to have been greatly eroded and filled with sediment, showing just the bare circular outline, with little or no detectable ejecta. On the other hand, a post-Flood impact is generally expected to exhibit relatively sharp features plus ejecta, especially in a non-glacial and dry environment. A classic example is the Arizona Meteor Crater.262 Therefore, since most impact craters are barely detectable in the Flood sediments, it is likely that most impacts occurred during the Flood.
The largest iridium anomalies are probably due to impacts. This is because volcanically-produced iridium is mainly from basaltic eruptions, which probably were underwater eruptions during the Flood.263,264 Either way, multiple impacts and volcanic eruptions would explain the evidence of the many iridium anomalies, shocked quartz grains, tektites, etc. found in the geological record. The rapid sedimentation during the Flood would explain the observation that an iridium ‘spike’ can be composed of multiple spikes or else spread over more than a thin layer of sediment. Uniformitarian geologists date such relatively thick layers as lasting hundreds of thousands of years, but within the Flood an iridium-rich layer would be only an instant of time. Iridium-rich clay falling from the atmosphere would probably accumulate during temporary lulls in the Flood. The clay could fall rapidly due to coagulation of particles. Accumulations of iridium-rich clay would be unlikely at the beginning of the Flood, but more likely during the middle or end of the Flood. This is because of the rapid erosion and sedimentation likely at the beginning of the Flood.
The fact that few extinctions occur right at the exact K/T boundary bodes ill for the meteorite theory. There are only 20 locations where dinosaurs are even close to the K/T boundary, as defined by an iridium anomaly or some other fossil criterion:
‘In the case of the Cretaceous-Tertiary boundary, many people—even professionals—are very surprised to discover that there are only about 20 localities, most of which are in North America, that preserve the last days of the dinosaurs.’265If most dinosaur extinctions are not associated with an Ir anomaly, then how could impacts have been the main cause for the death of the dinosaurs?
In a Flood model, the problem of the survival of certain sensitive organisms across the K/T boundary is not a problem, mainly because that ‘boundary’ is nothing special within the Flood paradigm and probably is not synchronous. The new discovery of polar dinosaurs is a problem for the meteorite theory, but can be explained within the Flood paradigm.266
Is the K/T boundary synchronous?All the hypotheses of dinosaur extinction assume that many dinosaurs, ammonites and other groups of organisms died out near the Cretaceous-Tertiary boundary. But is the K/T boundary, especially in relation to the extinction of the dinosaurs, a synchronous event worldwide within the Flood? It probably is not even a synchronous event within the uniformitarian paradigm.
The definition of the K/T boundary varies in different parts of the world, depending on whether the strata are presumed marine or terrestrial and depending upon which fossils are found in the strata. Defining a terrestrial or marine environment can be challenging and is normally based on the fossils. Many terrestrial fossils could have been buried in marine environments, especially within a Flood paradigm and even within a uniformitarian paradigm. For instance, a classical late Cretaceous dinosaur site in eastern Montana is considered a terrestrial environment. However, shark remains are also found. Since dinosaurs and coal are abundant, the shark remains are relegated to having lived in a ‘freshwater’ habitat,267 even though sharks are marine today and it seems impossible physiologically to assign extinct sharks to a freshwater environment. In the Flood model, the observation of shark remains among dinosaurs would not be considered unusual, since one would expect that sharks would scavenge floating dinosaurs and occasionally end up entombed with dinosaurs.
Nowadays, the fossil dating method is so refined that each microorganism, whether a diatom, foraminifer, coccolith or radiolarian, has its own boundary-defining criterion. Some have claimed the definition of the K/T boundary based on these microfossils is rather subjective,269,270 and when the particular fossil is absent, a hiatus is presumed.271
Even the classical marine K/T section with a large Ir spike at Gubbio, Italy, is not without controversy. One geologist, after careful research, concluded that the section was a reworked Miocene turbidite.272 This idea was published after the section had been touted as a K/T impact horizon. Nevertheless, Alvarez and Lowrie273 jumped all over this result and prevailed. It seems that reworking is mainly invoked to support the prevailing paradigm. The K/T boundary at Gubbio is of reversed palaeomagnetism, so the K/T boundary in other areas also has to be reversely magnetised. However, at least one ocean core at the supposed K/T boundary was found to be normally magnetised.274 These two K/T boundaries are thus probably not synchronous.
For presumed terrestrial sediments, the boundary had been universally defined as the last appearance of the dinosaurs:
‘Critics charged that Rigby and his colleagues didn’t know exactly where the end of the Cretaceous was in the sediments that they were studying; after all—it was pointed out—the end of the Cretaceous was commonly recognised as the place where the last (youngest) dinosaur was preserved.’275However, defining the K/T boundary on the basis of the ‘youngest’ dinosaur fossil in a vertical section is a poor criterion, when only about 20 dinosaur localities from around the world are close to this boundary.276
Defining the K/T boundary based on the last dinosaur is also a circular definition, since scientists claim that the dinosaurs only lived in the Mesozoic when the presence of a dinosaur automatically defines the strata as Mesozoic. For instance, dinosaur remains from France and India were discovered in what were considered ‘Tertiary’ strata. The strata were subsequently redefined as ‘Cretaceous’!277,278
In eastern Montana, there is a controversy over whether dinosaurs lived into the Tertiary. The K/T boundary in this area is defined by a floral change, but it is also associated with a weak iridium anomaly (an original report of a significant Ir anomaly turned out to be contamination from a platinum ring worn by a technician preparing the samples for analysis279). Dinosaurs have been found above the defined K/T boundary from at least six sites, while ungulates, normally considered ‘Tertiary’, have been found below the boundary.280–282 Dinosaurs are also said to have survived well into the Palaeocene in other areas, such as the tropics of India, the Pyrenees, Peru and New Mexico.283 Of course, the data from Montana have been strongly contested with the suggestion that reworking had mixed the fossils.284 Reworking is a common mechanism for accounting for fossils in the wrong strata,285,286 preserving a semblance of order in the slow evolution of organisms with time. In spite of claims of reworking, Keith Rigby and his colleagues are sticking to their claim of Tertiary dinosaurs.287 Despite the merits of the various arguments, the circular reasoning is evident.
Another K/T defining criterion for a presumed terrestrial environment is a change in certain pollen or spores. In eastern Montana, the K/T boundary is also defined as the base of the Z coal layer. But some geologists believe this coal bed is diachronous, which would mean this definition of the K/T boundary is subjective.288 The problem for defining the K/T boundary in eastern Montana is compounded due to the many coal beds and the scattered nature of the outcrops.
All the many definitions of the K/T boundary are difficult to reconcile with each other into a worldwide synchronous time horizon within the uniformitarian paradigm:
‘Even given the entire fund of techniques, methods, and principles of correlation extant, there was still, in the past decade, widespread uncertainty about correlating marine rocks of K/T boundary age with their continental contemporaries, even where both sections were richly fossiliferous, because the two sections were almost always mutually exclusive in time-diagnostic fossils.’289That the K/T boundary from various areas is asynchronous is also admitted by Olsson and Liu:
‘Examination of recently reported K/P [K/T] boundary sections indicates that the placement of the K/P boundary is based on equivocal criteria and that the boundary as placed is not synchronous. The conclusion that the K/P boundary in several U.S. Gulf Coast sections is complete and within a condensed section is simply the artifact of delineating the K/P boundary on disparate paleontologic datum planes and preservational bias of the microfossil assemblages.’290And in correlation of widely scattered outcrops, there is the common problem of lateral facies and fossil changes that can cause uncertainty even in local and regional correlations.
Defining the K/T boundary as the last appearance of a particular fossil, a common procedure, is a dangerous exercise. This is because fossils have a habit of disappearing vertically at one location and reappearing at a ‘higher level’ at another location. This has been labelled the ‘Lazarus Effect’.291,292
Even though the various fossil definitions of the K/T boundary are asynchronous, could an Ir anomaly be used to define a synchronous K/T boundary, whether in a uniformitarian or a diluvial paradigm? The problem here is that there are many Ir anomalies in the strata, and many of the spikes at the ‘K/T boundary’ are weak or non-existent. In regard to dinosaur extinction, few dinosaur localities are even close to the defined K/T boundary, and even fewer are close to a significant Ir anomaly. There is also the problem that the K/T boundary is sometimes ‘defined’ by the Ir spike,293–295 introducing an element of circular reasoning.
Although palaeontologists believe most of the age differences between various defining fossils are minor, it underscores the subjective nature of the process and some of the problems in choosing the ‘K/T boundary’. The various K/T boundary defining criteria, as viewed by uniformitarian scientists, are probably asynchronous. Therefore, creationists should not assume the ‘K/T boundary’ and the extinction of the dinosaurs is a synchronous event within the Flood.
Summary and conclusionsDespite the many theories on dinosaur extinction, including the currently popular meteorite impact theory, the demise of the dinosaurs is still unexplained. Wherever dinosaur bones are unearthed, the evidence predominantly suggests catastrophic entombment by water, sometimes by clearly marine water. Just the burial and fossilisation of such massive hulks as the large dinosaurs indicates catastrophic action. There is also evidence that some dinosaurs were rapidly buried in at least regional debris flows. The large dinosaur bone-beds especially indicate a major catastrophe. Some of these bone-beds represent the remains of one dinosaur species, an unusual taphonomic condition. Babies and young juveniles are almost entirely missing as fossils, another enigmatic occurrence for those who assume uniformitarianism.
Billions of dinosaur tracks have recently been discovered, and these provide further evidence for unusual, stressful conditions. For instance, the tracks do not traverse hills, they are practically always orientated in a straight line, there are very few tracks of baby dinosaurs, and some dinosaurs that may have been poor swimmers are nearly absent. It is suggested that dinosaur tracks and remains could have occurred during temporary exposure of sediments during the first half of the Flood.
Dinosaur eggs, nests, and babies at first glance appear to contradict the hypothesis of briefly exposed sediments during the Flood. However, many unknowns still surround this fascinating evidence of in situ dinosaur activity.
The volcanic and meteorite theories for dinosaur extinction have both supportive and contrary data. The data from these theories can be fitted into a Flood model, a model in which the dinosaurs perished at different times within the first 150 days.
AcknowledgementsI appreciate and seek out discussion and input from other creationists. I thank Dr Andrew Snelling and Mr Peter Klevberg for reviewing an earlier draft of the manuscript. I benefited from personal discussions with Dr Robert Brown, Mr Roy Holt and Mr John Woodmorappe, and from the comments of an anonymous reviewer.
- Weishampel, D.B., Dinosaurian distribution. In: The Dinosauria, D.B. Weishampel, P. Dodson and H. Osmólska (eds), University of California Press, Los Angeles, pp. 63–139, 1991.
- Hammer, W.R. and Hickerson, W.J., A crested theropod dinosaur from Antarctica, Science 264:828–830, 1994.
- Colbert, E.H., Dinosaurs of the Arctic, Natural History 73(4):20–23, 1964.
- Weishampel, Ref. 1, p. 139.
- Oard, M.J., Polar dinosaurs and the Genesis Flood, Creation Research Society Quarterly 32:47–56, 1995.
- Brouwers, E.M., Clemens, W.A., Spicer, R.A., Ager, T.A., Carter, L.D. and Sliter, W.V., Dinosaurs on the North Slope, Alaska: high latitude, latest Cretaceous environments, Science 237:1608–1610, 1987.
- Parrish, J.M., Parish, J.T., Hutchison, J.H. and Spicer, R.A., Late Cretaceous vertebrate fossils from the North Slope of Alaska and implications for dinosaur ecology, Palaios 2:377–389, 1987.
- Clemens, W.A. and Nelms, L.G., Paleoecological implications of Alaskan terrestrial vertebrate fauna in latest Cretaceous time at high paleolatitudes, Geology 21:503–506, 1993.
- Paul, G.S., Physiological, migrational, climatological, geophysical, survival, and evolutionary implications of Cretaceous polar dinosaurs, Journal of Paleontology 62:640–652, 1988.
- Benton, M.J., Polar dinosaurs and ancient climates, Trends in Ecology and Evolution, 6(1):28–30, 1991.
- Fastovsky, D. E. and Weishampel, D.B., The Evolution and Extinction of the Dinosaurs, Cambridge University Press, London, p. 11, 1996.
- Parrish et al., Ref. 7.
- Colbert, Ref. 3.
- Gillette, D.D. and Lockley, M.G. (eds), Dinosaurs Tracks and Traces, Cambridge University Press, London, 1989.
- Lockley, M., Tracking Dinosaurs—A New Look at an Ancient World, Cambridge University Press, London, 1991.
- Lockley, M. and Hunt, A.P., Dinosaur Tracks and Other Fossil Footprints of the Western United States, Columbia University Press, New York, 1995.
- Currie, P.J., The great dinosaur egg hunt, National Geographic 189(5):96–111, 1996.
- Sanz, J.L., Moratalla, J.J., Díaz-Molina, M., López-Martinez, N., Kälin, O. and Vianey-Liaud, M., Dinosaur nests at the sea shore, Nature 376:731–732, 1995.
- Anonymous, Dinosaurs packed like sardines, Discover 17(2):25, 1996.
- Anonymous, Did dinosaurs need mother love? Science News 149:315, 1996.
- Horner, J.R. and Makela, R., Nest of juveniles provides evidence of family structure among dinosaurs, Nature 282:296–298, 1979.
- Horner, J.R., The nesting behavior of dinosaurs, Scientific American 250(4):130–137, 1984.
- Zi-Kui, Z., Dinosaur eggs in China: on the structure and evolution of eggshells. In: Dinosaur Eggs and Babies, K. Carpenter, K.F. Hirsch and J.R. Horner (eds), Cambridge University Press, London, p. 197, 1994.
- Donovan, S.K., Palaeontological criteria for the recognition of mass extinction. In: Mass Extinctions: Processes and Evidence, S.K. Donovan (ed.), Columbia University Press, New York, pp. 19–36, 1989.
- Glen, W., How science works in the debates. In: The Mass-Extinction Debates: How Science Works in a Crisis, W. Glen (ed.), Stanford University Press, Stanford, California, pp. 50, 60, 1994.
- Donovan, S.K., Introduction. In: Mass Extinctions: Processes and Evidence, S. K. Donovan (ed.), Columbia University Press, New York, p. xii, 1989.
- Erwin, D.H., The mother of mass extinctions, Scientific American 275(1):72–78, 1996.
- Maxwell, W.D., The end Permian mass extinction. In: Mass Extinctions: Processes and Evidence, S.K. Donovan (ed.), Columbia University Press, New York, p. 152, 1989.
- Oard, M.J., Ancient Ice Ages or Gigantic Submarine Slides? Creation Research Society Books, Chino Valley, Arizona, 1997.
- Kerr, R.A., A shocking view of the Permo-Triassic, Science 274:1080, 1996.
- Sepkoski, Jr., J.J., A taxonomic structure of periodic extinction. In: Global Catastrophes in Earth History: An Interdisciplinary Conference on Impacts, Volcanism, and Mass Mortality, V.L. Sharpton and P.D. Ward (eds), Special Paper 247, Geological Society of America, Boulder, Colorado, pp. 33–44, 1990.
- Perlmutter, S., Muller, R.A., Pennypacker, D.R., Smith, C.K., Wang, L.P., White, S. and Yang, H.S., A search for Nemesis: current status and review of history. In: Global Catastrophes in Earth History; and Interdisciplinary Conference on Impacts, Volcanism, and Mass Mortality, V.L. Sharpton and P.D. Ward (eds), Special Paper 247, Geological Society of America, Boulder, Colorado, pp. 87–92, 1990.
- Orth, C.J., Geochemistry of the bio-event horizons. In: Mass Extinctions: Processes and Evidence, S.K. Donovan (ed.), Columbia University Press, New York, p. 39, 1989.
- Donovan, Ref. 24, p. 28.
- Oard, M.J., Ice ages; the mystery solved? Part III: paleomagnetic stratigraphy and data manipulation, Creation Research Society Quarterly 21:178–179, 1985.
- Charig, A., A New Look at the Dinosaurs, Mayflower Books, New York, 1979.
- Charig, A., A New Look at the Dinosaurs, Facts on File, Inc., New York, pp. 149–151, 1983.
- Bakker, R.T., The Dinosaur Heresies—New Theories Unlocking the Mystery of the Dinosaurs and Their Extinctions, Kensington Publishing Co., New York, pp. 425–444, 1986.
- Norman, D., Dinosaur! Prentice-Hall, New York, pp. 146–159, 1991.
- Fastovsky and Weishampel, Ref. 11, pp. 387–429.
- Benton, M.J., Scientific methodologies in collision—the history of the study of the extinction of the dinosaurs, Evolutionary Biology 24:371–400, 1990.
- Charig, Ref. 37, p. 150.
- Eriksson, E., Air-ocean-icecap interactions in relation to climatic fluctuations and glaciation cycles. In: Causes of Climatic Change, J.M Mitchell, Jr. (ed.), Meterological Monographs 8(30), American Meterological Society, Boston, p. 68, 1968.
- Charlesworth, J.K., The Quaternary Era, Edward Arnold, London, p. 1532, 1957.
- Hallam, A., The end of the Cretaceous, Nature 281:430–431, 1979.
- Hoffman, A., Changing palaeontological views on mass extinction phenomena. In: Mass Extinctions: Processes and Evidence, S.K. Donovan (ed.), Columbia University Press, New York, p. 4, 1989.
- Gartner, S. and McGuirk, J.P., Terminal Cretaceous extinction scenario for a catastrophe, Science 206:1272–1276, 1979.
- Hallam, Ref. 45.
- Kirkland, J.I., Predation of dinosaur nests by terrestrial crocodilians. In: Dinosaur Eggs and Babies, K. Carpenter, K.F. Hirsch and J.R. Horner (eds), Cambridge University Press, London, p. 124, 1994.
- Charig, Ref. 36.
- Gribbin, J., Did cancer kill the dinosaurs? New Scientist 149:(2012):17, 1996.
- Anonymous, Did neutrinos do in the dinosaurs? Science 271:601, 1996.
- Plummer, J., Death by virus, Discover 16(10):14, 1995.
- Emanuel, K.A., Speer, K., Rotunno, R., Srivastava, R. and Molina, M., Hypercanes: a possible link in global extinction scenarios, Journal of Geophysical Research 100(D7):13,755–13,765, 1995.
- Hecht, J., Did storms land the dinosaurs in hot water? New Scientist 145(1963):16, 1995.
- Alvarez, L.W., Alvarez, W., Asaro, F. and Michel, H.V., Extraterrestrial cause for the Cretaceous-Tertiary extinction, Science 208:1095–1108, 1980.
- Emiliani, C., Kraus, E.B. and Shoemaker, E.M., Sudden dearth at the end of the Mesozoic, Earth and Planetary Science Letters 55:317–334, 1981.
- Orth, C.J., Gilmore, J.S., Knight, J.D., Pillmore, C.L., Tschudy, R.H. and Fassett, J.E., An iridium abundance anomaly at the palynological Cretaceous-Tertiary boundary in northern New Mexico, Science 214:1341–1343, 1981.
- Alvarez, L.W., Experimental evidence that an asteroid impact led to the extinction of many species 65 million years ago, Proceedings of the National Academy of Science 80:627–642, 1983.
- Lerbekmo, J F., Sweet, A.R. and St Louis, R.M., The relationship between the iridium anomaly and palynological floral events at three Cretaceous-Tertiary boundary localities in western Canada, Geological Society of America Bulletin 99:325–330, 1987.
- Fastovsky and Weishampel, Ref. 11, p. 405.
- Shoemaker, E.M., Asteroid and comet bombardment of the earth, Annual Review of Earth and Planetary Science 11:461–494, 1983.
- Pollack, J.B., Toon, O.B., Ackerman, T.P., McKay, C.P. and Turco, R.P., Environmental effects of an impact-generated dust cloud: implications for the Cretaceous-Tertiary extinctions, Science 219: 287–289, 1983.
- Bohor, B.F., Foord, E.E., Modreski, P.J. and Triplehorn, D.M., Mineralogic evidence for an impact event at the Cretaceous-Tertiary boundary, Science 224:867–869, 1984.
- Bohor, B.F., Modreski, P.J. and Foord, E.E., Shocked quartz in the Cretaceous-Tertiary boundary clays: evidence for a global distribution, Science 236:705–709, 1987.
- Orth et al., Ref. 58.
- Wang, K., Geldsetzer, H.H.J. and Chatterton, B.D.E., A late Devonian extraterrestrial impact and extinction in eastern Gondwana: geochemical, sedimentological, and faunal evidence. In: Large Meteorite Impacts and Planetary Evolution, B.O. Dressler, R.A.F. Grieve and V.L. Sharpton (eds), Special Paper 293, Geological Society of America, Boulder, Colorado, p. 114, 1994.
- Wolbach, W.S., Gilmour, I. and Anders, E., Major wildfires at the Cretaceous/Tertiary boundary. In: Global Catastrophes in Earth History: An Interdisciplinary Conference on Impacts, Volcanism, and Mass Mortality, V.L. Sharpton and P.D. Ward (eds), Special Paper 247, Geological Society of America, Boulder, Colorado, pp. 391–400, 1990.
- Ganapathy, R., A major meteorite impact on the earth 65 million years ago: evidence from the Cretaceous-Tertiary boundary clay, Science 209:921–923, 1980.
- Luck, J.M. and Turekian, K.K., Osmium-187/osmium-186 in manganese nodules and the Cretaceous-Tertiary boundary, Science 222:613–615, 1983.
- Fastovsky and Weishampel, Ref. 11, pp. 407–409.
- Rampino, M.R. and Reynolds, R.C., Clay mineralogy of the Cretaceous-Tertiary boundary clay, Science 219:495–498, 1983.
- Officer, C.B. and Drake, C.L., The Cretaceous-Tertiary transition, Science 219:1383–1390, 1983.
- Albritton, Jr., C.C., Catastrophic Episodes in Earth History, Chapman and Hall, Hampshire, UK, pp. 150–158, 1989.
- Officer, C., Victims of volcanoes, New Scientist 137(1861): 34–38, 1993.
- Officer, C. and Page, J., The Great Dinosaur Extinction Controversy, Addison-Wesley Publishing Co., New York, 1996.
- Officer and Page, Ref. 76, pp. 110–129.
- Officer and Page, Ref. 76, p. 111.
- Zoller, W.H., Parrington, J.R. and Phelan Kotra, J.M., Iridum enrichment in airborne particles from Kilauea Volcano: January 1983, Science 222:1118–1121, 1983.
- Officer and Page, Ref. 76, pp. 124–129.
- Officer, Ref. 75, p. 38.
- McCartney, K., Huffman, A.R. and Tredoux, M., A paradigm for endogenous causation of mass extinctions. In: Global Catastrophes in Earth History: An Interdisciplinary Conference on Impacts, Volcanism, and Mass Mortality, V.L. Sharpton and P.D. Ward (eds), Special Paper 247, Geological Society of America, Boulder, Colorado, pp. 125–138, 1990.
- de Silva, S.L., Wolff, J.A. and Sharpton, V.L., Explosive volcanism and associated pressures; implications for models of endogenically shocked quartz. In: Global Catastrophes in Earth History: An Interdisciplinary Conference on Impacts, Volcanism,and Mass Mortality, V.L. Sharpton and P.D. Ward (eds), Special Paper 247, Geological Society of America, Boulder, Colorado, pp. 139–145, 1990.
- Sharpton, V.L. and Grieve, R.A.F., Meteorite impact, cryptoexplosion, and shock metamorphism; a perspective on the evidence at the K/T boundary. In: Global Catastrophes in Earth History: An Interdisciplinary Conference on Impacts, Volcanism, and Mass Mortality, V.L. Sharpton and P.D. Ward (eds), Special Paper 247, Geological Society of America, Boulder, Colorado, pp. 301–318, 1990.
- Officer and Page, Ref. 76, pp. 124–129.
- Officer, Ref. 75, p. 38.
- Officer and Page, Ref. 76, pp. 122–123.
- Crocket, J.H., Officer, C.B., Wezel, F.C. and Johnson, G.D., Distribution of noble metals across the Cretaceous/Tertiary boundary at Gubbio, Italy: iridium variation as a constraint on the duration and nature of Cretaceous/Tertiary boundary events, Geology 16:77–80, 1988.
- McCartney et al., Ref. 82, p. 129.
- Alexander, R.M., Dynamics of Dinosaurs and Other Extinct Giants, Columbia University Press, New York, p. 146, 1989.
- Officer and Drake, Ref. 73, p. 1386.
- Rampino and Reynolds, Ref. 72, pp. 496–497.
- Patrusky, B., Mass extinctions; the biological side, Masaic17(4):2–13, 1986/7.
- Anonymous, Asteroid impact and mass extinction, EOS 63(5):142, 1982.
- Archibald, J.D. and Clemens, W.A., Late Cretaceous extinctions, American Scientist 70:377–385, 1982.
- Officer and Page, Ref. 76, p. 98.
- McCartney et al., Ref. 82, p. 127.
- Ganapathy, R., Evidence for a major meteorite impact on the earth 34 million years ago: implication for Eocene extinctions, Science 216:885–886, 1982.
- Alvarez, W., Asaro, F., Michel, H.V. and Alvarez, L.W., Iridium anomaly approximately synchronous with terminal Eocene extinctions, Science 216:886–888, 1982.
- Donovan, S.K., Iridium anomalous no longer? Nature 326:331–332, 1987.
- Orth, C.J., Geochemistry of the bio-event horizons. In: Mass Extinctions: Processes and Evidence, S.K. Donovan (ed.), Columbia University Press, New York, pp. 37–72, 1989.
- Orth, C.J., Attrep Jr., M. and Quintana, L.R., Iridium abundance patterns across bio-event horizons in the fossil record. In: Global Catastrophes in Earth History: An Interdisciplinary Conference on Impacts, Volcanism, and Mass Mortality, V.L. Sharpton and P.D. Ward (eds), Special Paper 247, Geological Society of America, Boulder, Colorado, pp. 45–59, 1990.
- Clymer, A.K., Bice, D.M. and Montanari, A., Shocked quartz from the late Eocene: impact evidence from Massignano, Italy, Geology 24:483–486, 1996.
- Langenhorst, F. and Clymer, A.K., Characteristics of shocked quartz in late Eocene impact ejecta from Massignano (Ancona, Italy): clues to shock conditions and source crater, Geology 24:487–490, 1996.
- Leroux, H., Warme, J.E. and Doukhan, J.-C., Shocked quartz in the Alamo breccia, southern Nevada: evidence for a Devonian impact event, Geology 23:1003–1006, 1995.
- Donovan, Ref. 24, p. 25.
- Patrusky, Ref. 93.
- Officer and Page, Ref. 76, pp. 46–60.
- Kent, D.V., Asteroid extinction hypothesis, Science 211:648, 650, 1981.
- Oard, Ref. 5, p. 48.
- Clemens, W.A. and Nelms, L.G., Paleoecological implications of Alaskan terrestrial vertebrate fauna in latest Cretaceous time at high paleolatitudes, Geology 21:503–506, 1993.
- Rampino and Reynolds, Ref. 72, p. 497.
- Huribert, S.H. and Archibald, J.D., No statistical support for sudden (or gradual) extinction of dinosaurs, Geology 23:881–884, 1995.
- Officer and Page, Ref. 76, pp. 151–155.
- Williams, M.E., Catastrophic versus noncatastrophic extinction of the dinosaurs: testing, falsifiability, and the burden of proof, Journal of Paleontology 68:183–190, 1994.
- Hut, P., Alvarez, W., Elder, W.P., Hansen, T., Kauffman, E.G., Keller, G., Shoemaker, E.M. and Weissman, P.R., Comet showers as a cause of mass extinctions, Nature 329:118–126, 1987.
- McCartney et al., Ref. 82, p. 125.
- Colodner, D.C., Boyle, E.A., Edmond, J.M. and Thomson, J., Post-depositional mobility of platinum, iridium and rhenium in marine sediments, Nature 358:402–404, 1992.
- Dressler, B.O., Grieve, R.A.F. and Sharpton, V.L., Preface. In: Large Meteorite Impacts and Planetary Evolution, B.O. Dressler, R.A.F. Grieve and V.L. Sharpton (eds), Special Paper 293, Geological Society of America, Boulder, Colorado, p. vii, 1994.
- Marvin, U.B., Impact and its revolutionary implications for geology. In: Global Catastrophes in Earth History: An Interdisciplinary Conference on Impacts, Volcanism, and Mass Mortality, V.L. Sharpton and P.D. Ward (eds), Special Paper 247, Geological Society of America, Boulder, Colorado, pp. 147–154, 1990.
- Bruns, P., Dullo, W.-C., Hay, W.W., Wold, C.N. and Pernicka, E., Iridium concentration as an estimator of instantaneous sediment accumulation rates, Journal of Sedimentary Research 66:610, 1996.
- Officer and Page, Ref. 76.
- Glen, Ref. 25, p. 46.
- Raup, D.M., The extinction debates: a view from the trenches. In: The Mass-Extinction Debates: How Science Works in a Crisis, W. Glen (ed.), Stanford University Press, Stanford, California, p. 151, 1994.
- Glen, Ref. 25, pp. 39–91.
- Glen, W., On the mass-extinction debates: an interview with Stephen Jay Gould. In: The Mass-Extinction Debates: How Science Works in a Crisis, W. Glen (ed.), Stanford University Press, Stanford, California, p. 261, 1994.
- Officer and Page, Ref. 76, pp. 82–95.
- Glen, Ref. 25, p. 79.
- Glen, W. (ed.), The Mass-Extinction Debates: How Science Works in a Crisis, Stanford University Press, Stanford, California, 1994.
- Officer and Page, Ref. 76.
- Glen, Ref. 25, pp. 47, 48, 87.
- Paul, G.S., Dinosaur reproduction in the fast lane: implications of size, success, and extinction. In: Dinosaur Eggs and Babies, K. Carpenter, K.F. Hirsch and J.R. Horner (eds), Cambridge University Press, London, pp. 252–253, 1994.
- Holroyd, III, E.W., Comments on the fossils of Dinosaur Ridge, Creation Research Society Quarterly 29:6–13, 1992.
- Holroyd, III, E.W., Confirmation from a debris flow at a forest fire site, Creation Research Society Quarterly 33:141–151, 1996.
- Holroyd, III, E.W., Observations of fossil material and charcoalized wood in the Dakota Formation in Colorado and Wyoming, Creation Research Society Quarterly 33:170–175, 1996.
- Glen, W., On the mass-extinction debates: an interview with William A. Clemens. In: The Mass-Extinction Debates: How Science Works in a Crisis, W. Glen (ed.), Stanford University Press, Stanford, California, p. 243, 1994.
- Carpenter, K., Dilkes, D. and Weishampel, D.B., The dinosaurs of the Niobrara Chalk Formation (Upper Cretaceous, Kansas), Journal of Vertebrate Paleontology 15:275–297, 1995.
- Horner, J.R., Upper Cretaceous dinosaurs from the Bearpaw Shale (marine) of south-central Montana with a checklist of upper Cretaceous dinosaur remains from marine sediments in North America, Journal of Paleontology 53:566–577, 1979.
- Fiorillo, A.R., The first occurrence of hadrosaur (dinosauria) remains from the marine Claggett Formation, Late Cretaceous of south-central Montana, Journal of Vertebrate Palentology 10:515–517, 1990.
- Bakker, Ref. 38, pp. 1–481.
- Fastovsky and Weishampel, Ref. 11, pp. 1–460.
- Colbert, E.H., Men and Dinosaurs, E.P. Dutton and Co., New York, 1968.
- Varricchio, D.J. and Horner, J.R., Hadrosaurid and lambeosaurid bone beds from the Upper Cretaceous Two Medicine Formation of Montana: taphonomic and biological implications, Canadian Journal of Earth Sciences 30:997–1006, 1993.
- Horner, J.R. and Gorman, J., Digging Dinosaurs, Workman Publishing, New York, 1988.
- Horner and Gorman, Ref. 144, p. 122.
- Horner and Gorman, Ref. 144, pp. 122, 123.
- Holroyd, III, E.W., Oard, M.J. and Petersen, D., Opportunities for creationist studies at the Hanson Ranch, Roxson, Wyoming, Creation Research Society Quarterly 33:136–140, 1996.
- Currie, P.J., Hunting dinosaurs in Alberta’s great bone-bed, Canadian Geographic 101:34–39, 1981.
- Wood, J.M., Thomas, R.G. and Visser, J., Fluvial processes and vertebrate taphonomy: the Upper Cretaceous Judith River Formation, south-central Dinosaur Provincial Park, Alberta, Canada, Palaeogeography, Palaeoclimatology, Palaeoecology 66:127–143, 1988.
- Williams, Ref. 115, p. 184.
- Colbert, Ref. 142, p. 162.
- Stokes, W.L., The Cleveland-Lloyd Dinosaur Quarry: Window to the Past, Bureau of Land Management, US Department of the Interior, Washington, DC, 1985.
- Colbert, Ref. 142, p. 173.
- Bakker, Ref. 38, p. 39.
- Fastovsky and Weishampel, Ref. 11, pp. 190–194.
- Morell, V., New African dinosaurs give an old world a novel look, Science 266:219–220, 1994.
- Lessem, D., Kings of Creation—How a New Breed of Scientists is Revolutionizing Our Understanding of Dinosaurs, Simon and Schuster, New York, pp. 123–148, 1992.
- Lessem, Ref. 157, pp. 225–256.
- Dashzeveg, D., Novacek, M.J., Norell, M.A., Clark, J.M., Chiappe, L.M., Davidson, A., McKenna, M.C., Dingus, L., Swisher, C. and Altangerel, O., Extraordinary preservation in a new vertebrate assemblage from the Late Cretaceous of Mongolia, Nature 374:446–449, 1995.
- Dong, Z.-M., On the discovery of an oviraptorid skeleton on a nest of eggs at Bayan Mandahu, Inner Mongolia, People’s Republic of China, Canadian Journal of Earth Sciences 33:631–636, 1996.
- Weishampel, D.B., Brooding with the best, Nature 376:764–765, 1996.
- Rogers, R.R., Taphonomy of three dinosaur bone beds in the Upper Cretaceous Two Medicine Formation of northwestern Montana: evidence for drought-related mortality, Palaios 5:394–413, 1990.
- Varricchio and Horner, Ref. 143.
- Coombs, Jr., W.P., Behavior patterns of dinosaurs. In: The Dinosauria, D.B. Weishampel, P. Dodson and H. Osmólska (eds), University of California Press, Berkeley, California, pp. 33–34, 1991.
- Coombs, Ref. 164, p. 33.
- Horner, J.R., Comparative taphonmy of some dinosaur and extant bird colonial nesting grounds. In: Dinosaur Eggs and Babies, K. Carpenter, K.F. Hirsch and J.R. Horner (eds), Cambridge University Press, London, p. 121, 1994.
- Horner and Gorman, Ref. 144, p. 27.
- Currie, Ref. 148.
- Bakker, Ref. 38, pp. 110–112.
- Rogers, Ref. 162.
- Currie, P.J. and Jacobsen, A.R., An azhdarchid pterosaur eaten by a velociraptorine theropod, Canadian Journal of Earth Sciences 32:922–925, 1995.
- Oard, Ref. 5.
- Barnette, D.W. and Baumgardner, J.R., Patterns of ocean circulation over the continents during Noah’s Flood. In: Proceedings of the Third International Conference on Creationism, R.E. Walsh (ed.), Creation Science Fellowship, Pittsburgh, Pennsylvania, pp. 77–86, 1994.
- Walker, T., A biblical geological model. In: Proceedings of the Third International Conference on Creationism, R. E. Walsh (ed.), Creation Science Fellowship, Pittsburgh, Pennsylvania, pp. 581–592, 1994.
- Oard, Ref. 5.
- Gillette and Lockley, Ref. 14.
- Lockley, Ref. 15.
- Lockley and Hunt, Ref. 16.
- Lockley and Hunt, Ref. 16, p. 18.
- Lockley and Hunt, Ref. 16.
- Lockley, Ref. 15, pp. 136–138.
- Dobson, P., Behrensmeyer, A.K., Bakker, R.T. and McIntosh, J.S., Taphonomy and paleoecology of the dinosaur beds of the Jurassic Morrison Formation, Paleobiology 6(2):228, 1980.
- Dobson et al., Ref. 182, p. 218.
- Stokes, Ref. 152, p. 3.
- Lockley, M.G., Dinosaur ontogeny and population structure: interpretations and speculations based on fossil footprints. In: Dinosaur Eggs and Babies, K. Carpenter, K.F. Hirsch and J.R. Horner (eds), Cambridge University Press, London, pp. 347–365, 1994.
- Lockley and Hunt, Ref. 16, p. 165.
- Lockley, Ref. 15, pp. 31–32.
- Lockley and Hunt, Ref. 16, pp. 121, 207.
- Coombs, Ref. 164, p. 42.
- Lockley, Ref. 185, p. 359.
- Lockley and Hunt, Ref. 16, pp. 229, 231.
- Currie, P.J., Hadrosaur trackways from the Lower Cretaceous of Canada, Acta Palaeontologica Polonica 28:63–73, 1983.
- Currie, P.J., Nadon, G.C. and Lockley, M.G., Dinosaur footprints with skin impressions from the Cretaceous of Alberta and Colorado, Canadian Journal of Earth Sciences 28:102–115, 1991.
- Lockley and Hunt, Ref. 16, pp. 152–153.
- Oard, Ref. 5.
- Barnette and Baumgardner, Ref. 173.
- Carpenter, K., Hirsch, K.F. and Horner, J.R. (eds), Dinosaur Eggs and Babies, Cambridge University Press, London, 1994.
- Norell, M.A., Clark, J.M, Demberelyin, D., Rhinchen, B., Chiappe, L.M., Davidson, A.R., McKenna, M.C., Altangerel, P. and Novacek, M.J., A theropod dinosaur embryo and the affinities of the Flaming Cliffs dinosaur eggs, Science 266:779–782, 1994.
- Horner and Gorman, Ref. 144.
- Horner, Ref. 166.
- Horner, J.R. and Currie, P.J., Embryonic and neonatal morphology and ontogeny of a new species of Hypacrosaurus (Ornithischia, Lambeosauridae) from Montana and Alberta. In: Dinosaur Eggs and Babies, K. Carpenter, K.F. Hirsch and J.R. Horner (eds), Cambridge University Press, London, pp. 312–336, 1994.
- Garner, P., Where is the Flood/post-Flood boundary? Implications of dinosaur nests in the Mesozoic, TJ 10(1):101–113, 1996.
- Garner, P., Robinson, S., Garton, M. and Tyler, D., Comments on polar dinosaurs and the Genesis Flood, Creation Research Society Quarterly 32:232–234, 1996.
- Robinson, S.J., Can Flood geology explain the fossil record? TJ 10(1):59–60, 1996.
- Horner, J.R., Evidence of colonial nesting and ‘site fidelity’ among ornithischian dinosaurs, Nature 297:675–676, 1982.
- Horner, Ref. 205.
- Garner, Ref. 202, p. 103.
- Oard, M.J., Where is the Flood/post-Flood boundary in the rock record? TJ 10(2):273–274, 1996.
- Horner and Currie, Ref. 201.
- Oard, Ref. 5.
- Oard, M.J., Polar dinosaurs: response to Garner, Robinson, Garton, and Tyler, Creation Research Society Quarterly 32:237–239, 1996.
- Horner, Ref. 166, p. 117.
- Horner and Currie, Ref. 201.
- Horner and Gorman, Ref. 144.
- Brown, R.H., personal communication.
- Holt, R., personal communication.
- Horner, Ref. 22.
- Garner, Ref. 202, p. 103.
- Holt, R., personal communication.
- Hirsch, K.F. and Quinn, B., Eggs and eggshell fragments from the Upper Cretaceous Two Medicine Formation of Montana, Journal of Vertebrate Paleontology 10:491–511, 1990.
- Horner, J.R. and Weishampel, D.B., A comparative embryological study of two ornithischian dinosaurs, Nature 383:103, 1996.
- Varricchio, D.J., Jackson, F., Borkowski, J.J. and Horner, J.R., Nest and egg clutches of the dinosaur Troödon formosus and the evolution of avian reproductive traits, Nature 385:247–250, 1997.
- Montellano, M., Alphadon halleyi (Didelphidae, marsupialia) from the Two Medicine Formation (Late Cretaceous, Judithian) of Montana, Journal of Vertebrate Paleontology 8:378–382, 1988.
- Padian, K., A large pterodactyloid pterosaur from the Two Medicine Formation (Campanian) of Montana, Journal of Vertebrate Paleontology 4:516–524, 1984.
- Padian, K. and Smith, M., New light on Late Cretaceous pterosaur material from Montana, Journal of Vertebrate Paleontology 12: 87–92, 1992.
- Horner and Gorman, Ref. 144, pp. 113, 161.
- Horner and Gorman, Ref. 144, p. 160.
- Horner, Ref. 166.
- Horner, J.R. and Weishampel, D.B., Dinosaur eggs: the inside story, Natural History 98(12):66, 1989.
- Fastovsky and Weishampel, Ref. 11, p. 287.
- Horner and Gorman, Ref. 144, p. 160.
- Horner, Ref. 22.
- Lorenz, J.C., Sedimentary and Tectonic History of the Two Medicine Formation, Late Cretaceous (Campanian), Northwestern Montana, Ph.D. thesis, Princeton University, Princeton, New Jersey, pp. 110–117, 1981.
- Gavin, W.M.B., A Paleoenvironmental Reconstruction of the Cretaceous Willow Creek Anticline Dinosaur Nesting Locality: North Central Montana, M.S. thesis, Montana State University, Bozeman, Montana, 1986.
- Woodmorappe, J., personal communication.
- Horner and Gorman, Ref. 144.
- Geist, N.R. and Jones, T.D., Juvenile skeletal structure and the reproductive habits of dinosaurs, Science 272:712–714, 1996.
- Hirsch, K.F., Interpretations of Cretaceous and pre-Cretaceous eggs and shell fragments. In: Dinosaur Tracks and Traces, D.D. Gillette and M.G. Lockley (eds), Cambridge University Press, New York, pp. 89–97, 1989.
- Jain, S.L., Recent dinosaur discoveries in India, including eggshells, nests and coprolites. In: Dinosaur Tracks and Traces, D.D. Gillette and M.G. Lockley (eds), Cambridge University Press, New York, pp. 99–102, 1989.
- Hirsch, K.F., The fossil record of vertebrate eggs. In: The Palaeobiology of Trace Fossils, S. K. Donovan (ed.), The Johns Hopkins University Press, Baltimore, p. 280, 1994.
- Hirsch, K.F., Stadtman, K.L., Miller, W.E. and Madsen, Jr., J.H., Upper Jurassic dinosaur egg from Utah, Science 243:1711–1713, 1989.
- Hirsch, Ref. 238.
- Jain, Ref. 239.
- Zhao, Z.-K., Dinosaur eggs in China: on the structure and evolution of eggshells. In: Dinosaur Eggs and Babies, K., Carpenter, K.F. Hirsch and J.R. Horner (eds), Cambridge University Press, London, pp. 184–203, 1994.
- Hirsch, Ref. 240, pp. 269–294.
- Hirsch, K.F., Upper Jurassic eggshells from the western interior of North America. In: Dinosaur Eggs and Babies, K. Carpenter, K.F. Hirsch and J.R. Horner (eds), Cambridge University Press, London, pp. 137–150, 1994.
- Norman, D.B., Embryos in dinosaur nests, Nature 332:202–203, 1988.
- Anonymous, Ref. 20.
- O’Brien, C., Dinosaur embryos spark excitement, concern, Science 267:760, 1995.
- Hunter, M.J., Is the pre-Flood/Flood boundary in the Earth’s mantle? TJ 10(3):344–357, 1996.
- Holt, R., Evidence for a Late Cainozoic Flood/post-Flood boundary, TJ 10(1):140–142, 1996.
- Auldaney, J., Asteroids and their connection to the Flood. In: Proceedings of the Twin-Cities Creation Conference, Northwestern College, Roseville, Minnesota, pp. 133–136, 1992.
- Auldaney, J., Asteroid hypothesis for dinosaur extinction, Creation Research Society Quarterly 31:11–12, 1994.
- Froede, Jr., C.F. and deYoung, D.B., Impact events within the young-earth Flood model, Creation Research Society Quarterly 33:23–34, 1996.
- Oard, M.J., Response to comments on the asteroid hypothesis for dinosaur extinction, Creation Research Society Quarterly 31:12, 1994.
- Desonie, D., The threat from space, Earth 5(4):29, 1996.
- Holt, R., personal communication.
- Holt, Ref. 251, pp. 128–167.
- Oard, Ref. 208, pp. 258–278.
- Morris, H.M., The geological column and the Flood of Genesis, Creation Research Society Quarterly 33:49–57, 1996.
- Holt, Ref. 251, pp. 131–139.
- deYoung, D.B., Age of the Arizona Meteor Crater, Creation Research Society Quarterly 31:153–158, 1994.
- Oard, Ref. 208, pp. 271–273.
- Holt, Ref. 251, pp. 128–167.
- Fastovsky and Weishampel, Ref. 11, p. 391.
- Oard, Ref. 5.
- Archibald, J.D., Major extinctions of land-dwelling vertebrates at the Cretaceous-Tertiary boundary, eastern Montana: comment and reply, Geology 21:91, 1993.
- Archibald and Clemens, Ref. 95, p. 378.
- Olsson, R.K. and Liu, C., Controversies on the placement of Cretaceous-Paleogene boundary and the K/P mass extinction of planktonic foraminifera, Palaios 8:127, 1993.
- Glen, Ref. 25, pp. 77, 78.
- Schopf, T.J.M., Cretaceous endings, Science 211:571–572, 1981.
- Surlyk, F., The Cretaceous-Tertiary boundary event, Nature 285:187–188, 1980.
- Alvarez, W. and Lowrie, W., Upper Cretaceous to Eocene pelagic limestones of the Scaglia Rossa are not Miocene turbidites, Nature 294:245–247, 1981.
- Officer and Draker, Ref. 73, pp. 1385, 1386.
- Fastovsky and Weishampel, Ref. 11, p. 385.
- Fastovsky and Weishampel, Ref. 11, p. 391.
- Cousin, R., Breton, G., Fournier, R. and Watt, J.-P., Dinosaur egglaying and nesting in France. In: Dinosaur Eggs and Babies, K. Carpenter, K.F. Hirsch and J.R. Horner (eds), Cambridge University Press, London, p. 57, 1994.
- Sahni, A., Tandon, S.K., Jolly, A., Bajpai, S., Sood, A. and Srinivasan, S., Upper Cretaceous dinosaur eggs and nesting sites from the Deccan volcano-sedimentary province of peninsular India. In: Dinosaur Eggs and Babies, K. Carpenter, K.F. Hirsch and J.R. Horner (eds), Cambridge University Press, London, p. 208, 1994.
- Alvarez et al., Ref. 99, p. 888.
- Sloan, R.E., Rigby, Jr., J.K., Van Valen, L.M. and Gabriel, D., Gradual dinosaur extinction and simultaneous ungulate radiation in the Hell Creek Formation, Science 232:629–633, 1986.
- Rigby, Jr., J.K., Newman, K.R., Smit, J., Van Der Kaars, S., Sloan, R.E. and Rigby, J.K., Dinosaurs from the Paleocene part of the Hell Creek Formation, McCone County, Montana, Palaios 2:296–302, 1987.
- Briggs, J.C., Mass extinction: fact or fallacy? In: The Mass- Extinction Debates: How Science Works in a Crisis, W. Glen (ed.), Stanford University Press, Stanford, California, p. 233, 234, 1994.
- Sloan et al., Ref. 280, p. 629.
- Fastovsky, D.E. and Dott, Jr., R.H., Sedimentology, stratigraphy, and extinctions during the Cretaceous-Paleogene transition at Bug Creek, Montana, Geology 14:279–282, 1986.
- MacLeod, K.G. and Huber, B.T., Strontium isotopic evidence for extensive reworking in sediments spanning the Cretaceous-Tertiary boundary at ODP Site 738, Geology 24:463–466, 1996.
- Olsson and Liu, Ref. 266, pp. 127f139.
- Fastovsky and Weishampel, Ref. 11, p. 385.
- Archibald and Clemens, Ref. 95, p. 179.
- Glen, Ref. 25, p. 78.
- Olsson and Liu, Ref. 266, p. 127.
- Jablonski, D., Comparisons among mass extinctions. In; Dynamics of Extinction, D.K. Elliot (ed.), John Wiley and Sons, New York, pp. 183–229, 1986.
- Jones, D.S., Mueller, P.A., Bryan, J.R., Dobson, J.P., Channell, J.E.T., Zachos, J.C. and Arthur, M.A., Biotic, geochemical, and paleomagnetic changes across the Cretaceous/Tertiary boundary at Braggs, Alabama, Geology 15:311–315, 1987.
- Bruns et al., Ref. 121, pp. 608–612.
- Lofgren, D.L., Hotton, C.L. and Runkel, A.C., Reworking of Cretaceous dinosaurs into Paleocene channel deposits, upper Hell Creek Formation, Montana, Geology 18:874–877, 1990.
- Braman, D.R. and Eberth, D.A., Palaeontology and Geology of the Edmonton Group (Late Cretaceous to Early Palaeocene), Red Deer River Valley, Alberta, Canada, Occasional Paper #2, Tyrrell Museum of Palaeontology, Drumheller, Alberta, Canada, p. 18, 1987.
Dinosauri, “il miracolo dei deserti”
Un lavoratore sostiene la testa della riproduzione di un Paralititan durante la preparazione della mostra ‘Dinosaur Expo 2009 – The Miracle of Deserts’, che apre oggi a Chiba vicino a Tokyo. In mostra per due mesi oltre 260 pezzi
( Dinosaurs, "the miracle of the desert"
An employee says the head of the reproduction of a Paralititan during preparation of the exhibition 'Dinosaur Expo 2009 - The Miracle of Deserts', which opens today in Chiba near Tokyo. On display for two months over 260 pieces)see the photogallery
Jennifer Viegas, Discovery News
SLIDE SHOW: Therizinosaur: A Dino With Nine-Inch Nails
Its skeleton, described in the current issue of Proceedings of the Royal Society B, represents the most complete remains ever excavated of a therizinosaur, meaning “reaper lizard.” It is one of only three such dinosaurs ever found in North America.
Lead author Lindsay Zanno told Discovery News that therizinosaurs, including the new Utah species, “are unusual in that they have small heads with a keratinous beak at the front of the mouth — the same material as the beak of modern birds — and small leaf-shaped teeth.”
“Their bellies are proportionally enormous, supporting large guts,” added Zanno, who is a researcher in the Department of Geology at The Field Museum. “They have greatly enlarged claws on their hands, short legs and tails, and four-toed feet.”
Therizinosaurs are theropod predatory dinosaurs, a group that includes the legendary Tyrannosaurus rex. The newly discovered 92.5-million-year-old Utah dinosaur was no lightweight either. As Zanno said, “You wouldn’t want to run into this guy in a dark alley.” But its teeth, beak, gut and other anatomical characteristics suggest it was an omnivore that mostly feasted on plants.
Co-author David Gillette, curator of paleontology at the Museum of Northern Arizona, told Discovery News the formidable-looking claws on Nothronychus graffami probably weren’t used to kill other large animals, but instead might have tackled “digging into termite mounds, mucking on the bottom of a lake or pond like a goose or moose, and raking leaves into its mouth from a mangrove forest like a ground sloth.”
To better understand the dietary evolution of theropods, the researchers studied information on 75 other species within this group. They determined therizinosaurs experienced an early evolutionary split from the Maniraptora, which includes modern birds and their closest extinct relatives. One such relative was Velociraptor, a carnivore that probably kicked prey to death with its large hind foot claws.
The new Utah dinosaur therefore suggests that “iconic predators like Velociraptor, one of the dinosaurian villains in the movie Jurassic Park — may have evolved from less fearsome plant-eating ancestors,” according to the scientists.
Since the very meat-loving Velociraptor emerged some 20 million years after plant-chomping Nothronychus graffami, it’s now thought that some dinosaurs might have first been carnivores that evolved into omnivores or herbivores, which re-evolved back into meat-eaters.
Paleontologists aren’t sure why some dinosaur lineages may have see-sawed back and forth with their diets.
“Our current thoughts are that in gaining the ability to eat more than just meat, maniraptorans may have been able to invade new niches in the ecosystem that were unavailable to them before,” Zanno said. “In other words, they may have been able to find a new way of living in the ecosystem and new resources to exploit that gave them an advantage and allowed them to diversify into new forms.”
Aside from what it reveals about dinosaur diets, the new Utah species is significant because of where it was found: in marine sediments that would have been between 60 and 100 miles away from the closest shoreline. The ancient sea is now part of a desert. Merle Graffam, a member of the excavation team, found the dinosaur while searching for sea-dwelling animals. The dinosaur was named after him.
“A big mystery is how this animal — either alive or as a carcass — could get so far out to sea without being torn apart by predators and scavengers,” Gillette said. “This ecosystem had at least five species of plesiosaurs and many sharks and predatory, scavenging fish.”
He added, “Maybe (the dinosaur) was stranded at sea and struggled for a few days before drowning and sinking to the bottom.”
Paul Heinrich, a research associate at the Louisiana Geological Survey, offers another explanation. He thinks such complete dinosaur skeletons recovered in seaways may have rafted out to open water on “floating islands” after storms.
The recovered Utah dinosaur’s remains are now on public display at the Museum of Northern Arizona. The exhibit, Therizinosaur: Mystery of the Sickle-Claw Dinosaur, will close in September before moving to the Arizona Museum of Natural History in Mesa.