The National Park That Was Stolen to Death...
In the Cretaceous period, a landslide in South Dakota buried a lot of cycad plants. They eventually turned to silicate fossils, and gradually, erosion brought them back to the surface of the earth. As the American West w...
https://www.neatorama.com/2017/07/11/The-National-Park-That-Was-Stolen-to-Death/
