Mammals of the Badlands. By Christina Hurley. Badlands: Geologic History. Started forming about 75 million years ago Are composed of 6 different formations Pierre Shale Yellow Mounds Chadron Formation Brule Formation Rockyford Ash Sharps Formation. Pierre Shale.
By Christina Hurley
“There once was a goose named Mon. He was a mongoose.” – Allison Moon
Illustration of different evolution theories. Third being the most current.