Western Interior Seaway: Cretaceous Shorelines of Colorado
Uploaded: Nov. 3, 2015, 2:59 p.m. |
Modified: June 23, 2019, 9:03 p.m. |
From about 100 million to 68 million years ago, a shallow seaway covered much of the center of North America. This animation shows the movement of shorelines through Colorado and surrounding areas from 100 million to 66 million years ago. The Sevier mountains can be seen developing to the west, and early Laramide uplifts begin to appear in Colorado and Wyoming as the seaway recedes.
Animation by Ludvig Rhodin, James Adson, and Joseph Rogers.
Geologic age: 100Ma