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Geologic Overview History

Geologic Overview History. Grand Canyon. Colorado Plateau. Colorado Plateau is defined by what did not happen to it. Colorado Plateau. Underlain by relatively thick “depleted” lithosphere. Green River. Colorado River. San Juan River. Little Colorado River. No erosion. All erosion.

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Geologic Overview History

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  1. Geologic Overview • History

  2. Grand Canyon

  3. Colorado Plateau

  4. Colorado Plateau is defined by what did not happen to it. Colorado Plateau

  5. Underlain by relatively thick “depleted” lithosphere.

  6. Green River Colorado River San Juan River Little Colorado River

  7. No erosion All erosion

  8. limestone shale sandstone

  9. joint surface

  10. “The Monument”

  11. Pinnacle below Royal Arch

  12. Grand Canyon Hoodoo

  13. Green River Colorado River San Juan River Little Colorado River

  14. Green River Colorado River San Juan River Little Colorado River

  15. Colorado River Delta

  16. Basin and Range 16-17 mya

  17. Basin and Range 10 mya

  18. Basin and Range 8 mya

  19. Basin and Range 6 mya

  20. Act 1 INITIAL OROGENY

  21. Tonto Platform

  22. Vishnu Schist

  23. Zoroaster Granite Vishnu Schist

  24. Vishnu Schist Zoroaster Granite

  25. Orogeny

  26. Island arc Island arc Micro-continents

  27. schist gneiss magma

  28. enlargement

  29. enlargement 500 my peneplain

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