John Day Fossil Beds National Monument
National monument, north-central Oregon, U.S. With an area of 14,014 acres (5,676 hectares), it is located along the John Day River (named after a Virginian scout of the 1811 Astor overland expedition). Fossils more than 54 million years old provide a paleontological record of six of the seven epochs of the Cenozoic Era.
This entry comes from Encyclopædia Britannica Concise.
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