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Utah’s Prehistoric Geography PowerPoint PPT Presentation


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Utah’s Prehistoric Geography. Forming Rocky Mountain Region. Some rocks from PRECAMBRIAN Era! Forming Mountains through Plate Pressures Uplift began in Mesozoic Era

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Utah’s Prehistoric Geography

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Utah s prehistoric geography

Utah’s

Prehistoric Geography


Forming rocky mountain region

Forming Rocky Mountain Region

  • Some rocks from PRECAMBRIAN Era!

  • Forming Mountains through Plate Pressures

    • Uplift began in Mesozoic Era

    • Earth’s surface crunched together by pressures from Pacific and Atlantic Oceans


Forming rocky mountain region1

Forming Rocky Mountain Region

  • Forming Mountains through Volcanoes

    • Sometimes, volcanoes erupted and magma formed sharp peaks

  • Forming Mountains through Glaciers

    • As ice age melted, glaciers moved and carved


  • Forming the great basin region

    Forming the Great Basin Region

    • Forming Basins

      • Some land was forced UP by faults (mountains)

      • Some land left flat and low (valley)

      • Creates a BOWL!

    Basin


    Forming great basin region

    Forming Great Basin Region

    • Ancient Lakes

      • As the ice age (Cenozoic Age) melted away, lakes were left behind

      • Lake Bonneville filled basins

      • Over time, water evaporated

      • Left behind Great Salt Lake, Utah Lake, Sevier Lake

  • Volcanic Remains

    • Molten rock (lava) pushes through the earth’s crust

    • Craters and hardened lava


  • Forming the colorado plateau region

    Forming the Colorado Plateau Region

    • Forming Plateaus

      • Mountains were formed by faults

      • The mountains were squeezed in and up, creating top of plateau

      • Water and erosion washed away side walls, creating sheer cliffs and canyons

  • Forming other Rock Formations

    • Some magma pushed through earth’s crust

    • Formed by water and erosion


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