The White River Badlands: Geology and Paleontology

This guide to the South Dakota region that houses the world's richest fossil beds does "an excellent job of presenting the current state of knowledge" (Choice).

The forbidding Big Badlands in Western South Dakota contain the richest fossil beds in the world. Even today these rocks continue to yield new specimens brought to light by snowmelt and rain washing away soft rock deposited on a floodplain long ago. The quality and quantity of the fossils are superb: most of the species to be found ...