One of many fossil filled boulders in the Clam Beds along Red Basin Trail in Petrified Forest National Park, Arizona, United States of America, North America

Petrified tree, runoff area of the Grand Prismatic Spring, Midway Geyser Basin, colored thermophilic bacteria, microorganisms, hot springs, Yellowstone National Park, Wyoming, United States of America, USA

Fish fossil is held in the palm of a hand. Some of the world's best preserved fossils are found in the Fossil Butte National Monument on flat-topped ridges of southwestern Wyoming's cold sagebrush desert. Discoveries from the ancient lake sediments the Eocene Green River Formation of Fossil Basin are world-renowned, Wyoming, United States of America