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John Day Fossil Beds National Monument is a U.S. National Monument in Wheeler and Grant counties in east-central Oregon. Located within the John Day River basin and managed by the National Park Service, the park is known for its well-preserved layers of fossil plants and mammals that lived in the region between the late Eocene, about 44 million years ago, and the late Miocene, about 7 million years ago. The monument consists of three geographically separate units: Sheep Rock, Painted Hills, and Clarno. ( From Wikipedia )
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