Morrison formation



The Morrison formation is a layer of sediments famous for its many dinosaurs. It covers parts of New Mexico, Arizona, Utah, Colorado, Montana, North Dakota and Saskatchewan in Canada. When one visits Dinosaur National Monument, you are looking at dinosaur remains within the Morrison.

It is easily recognized in Utah and Colorado by the "Neopolitan Ice Cream" colours of the layers. Interestingly, dinosaurs are not the most common fossil in it, but rather clams. This is also interesting in that it is well acknowledged by paleontologists that these dinosaurs and clams were buried in a flash flood. However, this flash flood extends for thousands of kilometers, thousands of meters above sea level. Yet, when the demise of the dinosaurs is discussed, an asteroid impact is always brought into play. This simply does not line up with the field evidence.