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Colorado Geology

Updated 2021-09-06
  • Roxborough State Park, Colorado

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    Much of Colorado was once covered by an ancient seafloor. The vertical red rocks at places like Roxborough State Park, west of Denver, or the Flatirons west of Boulder, are dramatic remnants of that seafloor, pushed up along with the rest of the Rocky Mountains some 65 million years ago.
    Roxborough State Park, Colorado
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