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Date: 2014-10-01 18:29:24Fossils Paleobotany Specimen Ridge Petrified wood Yellowstone National Park Slough Creek Grand Teton National Park Polystrate fossil Wyoming Geography of the United States Greater Yellowstone Ecosystem | National Park Service U.S. Department of the Interior Specimen Ridge Day Hike Yellowstone National ParkAdd to Reading ListSource URL: www.nps.govDownload Document from Source WebsiteFile Size: 591,83 KBShare Document on Facebook |