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Mammoth Hot Springs
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This photo offers a view of the Main Terrace as well as Mt. Everts. Main Terrace is constantly changing as new springs show up and others become inactive. Mt. Everts, seen in the distance, is made up of distinctly layered sandstones and shales--sedimentary rocks deposited when this area was covered by a shallow inland sea, 70 to 140 million years ago.
Source: National Park Service
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