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The Colorado Plateau

The Colorado Plateau. Mark Gorenc Dina Freedman 9.13.11 GEOG 6950. Geography. Image of the CP like this or similar. 130,000 square km roughly equal to Alabama Bound by the Uintas, Rockies, Wasatch Range, Rio Grand Rift, the Mogollon Rim and Basin and Range Province

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The Colorado Plateau

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  1. The Colorado Plateau Mark Gorenc Dina Freedman 9.13.11 GEOG 6950

  2. Geography • Image of the CP like this or similar • 130,000 square km roughly equal to Alabama • Bound by the Uintas, Rockies, Wasatch Range, Rio Grand Rift, the Mogollon Rim and Basin and Range Province • Known for stunning geologic features and national parks

  3. Physical & Geological Characteristics • Elevations range from 1 to 4.2 km and average is 1.6 km • Landscape is relatively undeformed • Precambrian igneous basement with a thick sedimentary cover • Known for distinct structural and erosional features

  4. Crust and Lithosphere Properties • Compression by Farallon Plate Subduction • Farallon Plate sinking Initiates buffer free upwelling • Asthenosphere invasion into lithosphere • Generally controversial topic Modified from Humphreys et al. 2003

  5. Chronology • Upwelling of magmatic intrusions • Lithoshere-Asthenosphere interaction • Incision of Rivers to create today’s features • Faulting in Basement Rocks • Sedimentary Basin Fill • Farallon Plate Subduction and compression • Sinking of Farallon and extension Modified from Plummer 2005

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