Evolutionists have long been puzzled by the lack of dinosaur speciation in North America just prior to their date of 75 million years ago.  Before that time, there were varieties of dinosaurs.  Then about 75 million years ago, there was a wide variety of dinosaurs and they have been trying to understand what happened.

According to Terry Gates, a postdoctoral researcher with Ohio University’s Heritage College of Osteopathic Medicine who is lead author on the study:

Over the past century, paleontologists have found a wide variety of dinosaurs in rocks dating to around 75 million years ago, but right before the asteroid hit at the end of the Cretaceous, there appeared to be fewer species in North America.  The reason for this discrepancy in dinosaur diversity has never been adequately explained.

In trying to find an explanation for this sudden diversity, they studied the geological history of western North America, specifically the formation of mountains and large bodies of water that formed around 70-80 million years ago.  They believe that during that time frame, a huge mountain range called the Sevier Mountains rose up.  This mountain range extended from Alberta, Canada to southwestern U.S.  As the mountains rose up, it created an inland seaway called the Western Interior Seaway.  This literally flooded the central region of North America from the Gulf of Mexico north to the Canadian arctic.

The result of the Sevier Mountains and the internal seaway divided North America into three separate land masses or large islands.  Each land mass had their own dinosaur population.  During all this time, the dinosaur populations on each land mass evolved new species different from the other land masses.

Eventually, the Rocky Mountains rose up and closed off most of the seaway, once again joining the three land masses.  Once this happened, the rate of speciation slowed back down.  Therefore, the scientists believe that the geological isolation created at that time contributed to the more rapid speciation of North American dinosaurs.

When I look at the same data, I see the dinosaur fossils representing different ecological zones or niches, buried during the Genesis Flood.  As the waters rose, currents and tidal waves would have covered different elevations and life zones at different times.  As each life zone was buried, so was its dinosaurs.  Some areas had fewer dinosaurs than others, so in the eyes of the evolutionists, it would appear to be different rates of speciation.

During the Flood, there was a tremendous amount of geologic activity going on.  Mountain ranges rose up and some were torn down.  Land masses may have undulated to some extent, causing vast areas to rise and others to fall.

Same evidence, different conclusion.  Why?  I start with the Bible and evolutionists start with a belief in billions of years of godless evolution.  Our foundational beliefs govern how we interpret that very same evidence.


Mountains, Seaway Triggered North American Dinosaur Surge, Science Daily, Aug. 2, 2012.

Truth About Dinosaurs

In this stunning program, watch science and the Bible unite as you learn the amazing truth about these creatures. Using several museum-quality dinosaur fossils and specimens, Dr. G. Thomas Sharp will explain the Biblical view of dinosaur origins, and their disappearance, as he walks you through the five most frequently asked questions about these incredible animals.

Did Dinosaurs really exist? if so, when Did they exist? Where are they now? Why is the word Dinosaurs not in the Bible? Were Dinosaurs on Noahs ark?

Dr. Sharp will also reveal their fascinating history and the role they play in the development of a Biblical worldview.

Learn the Truth About Dinosaurs.

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