The eastern edge of the Clam Bed Mesa along the Red Basin Trail in Petrified Forest National Park, Arizona, United States of America, North America

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

The eastern edge of the Clam Bed Mesa along the Red Basin Trail in Petrified Forest National Park, Arizona, United States of America, North America