They believe that sediment accumulated slowly, fractions of an inch per year, over millions of years. Evolutionists believe that the coastline of the sea that covered the Great Plains occasionally moved back and forth from Louisiana to Canada, laying down a different kind of layer of sediment each time. The coastline receded whenever the land was uplifted. Whenever the land dropped, the sea came back and covered Montana again. So these layers represent different eras of geologic time.
Evolutionists claim that, The present is the key to the past.
We don t know. Creationists, on the other hand, believe that most of these layers were created by Noah s Flood. We have seen modern evidence, particularly at Mount St. Helens, that flooding can produce many feet of layered rock in a single day. So it is consistent with modern scientific observation that if a flood suddenly covered the Great Plains of the United States, it would leave the layered deposits that we actually do find. Why Dinosaurs Are Important Dinosaurs are important because they can help us determine which geologic interpretation is more plausible.