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| Island Park, Green River. Dinosaur National Monument.
Uintah County, Utah. July 1871. USGS Earth Science Photographic Archive digital file: hjk00681 At the downstream end of Whirlpool Canyon, the bedrock changes from Paleozoic age to Mesozoic age. Cliffs of cross-bedded sandstone of the Glen Canyon Formation (Late Triassic to Early Jurassic) crop out around the broad cove at Island Park. |
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