Western Interior Seaway Animation. What are the time frames for the two animations. The maps show the varied landscapes of the ancient Earth through hundreds of millions of years of geologic time including distribution of ancient shallow seas deep ocean basins.
Seven Key Time Slice maps 130 115 105 92 85 77 and 72 Ma overlap with the WIS maps. Western Interior Seaway Inspirational designs illustrations and graphic elements from the worlds best designers. Western Interior Seaway.
The Western Interior Seaway was a large inland sea that started to expand in the early Cretaceous period though geological evidence suggests it started to expand in the late Jurassic period.
This animation shows the movement of shorelines through Colorado and surrounding areas from 100 million to 66 million years ago. During its maximum extent approximately 92 million years ago it was 2000 miles long 600 miles wide and 2500 feet deep stretching from the Gulf of Mexico to the Arctic Ocean. It existed at its fullest extent from the mid-late Cretaceous period. When dinosaurs roamed.