Fossil Fish - Fossil Butte National Monument (U.S. National Park Service)

Fossil Butte National Monument - Wyoming

Fossil Butte National Monument (Utah) - Nomadic Niko

Fossil Butte National Monument - Unique Places in North America - WorldAtlas

File:Hyopsodus Fossil Butte National Monument.jpg - Wikimedia Commons

Fossil Butte National Monument – Wyoming

Fossil Butte National Monument — Caitlin Campbell Art

Park Archives: Fossil Butte National Monument

Approximately 50 million years ago, at the beginning of the Eocene Epoch, frigatebirds swooped above the waves of Fossil Lake, a vast, expansive lake

Fossil Butte National Monument Geologic Resources Inventory Report

Fossil Butte National Monument – Wyoming

Wyoming State Geological Survey

Fossil Fish - Fossil Butte National Monument (U.S. National Park Service)

Fossil Butte - Our Wyoming

Fossile Butte National Monument