Fossil Butte National Monument is a world famous protected piece of the Green River Formation. This Lagerstätte conserves the record of an ancient lake from the middle Eocene, 52 million years ago.
This documentary describes the various layers of the Green River Formation that local quarriers outside of the park boundaries commercially dig for fossils. Without their efforts many of the discoveries on display in the visitor center would never have been recovered!
This video was created while I volunteered at Fossil Butte following two summers of working there as an intern and interpretive Park Ranger. This video is now on display in the visitor center!