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Arid region geomorphology... What causes the erosion and deposition? - Wind, Water, and Gravity

Arid region geomorphology... What causes the erosion and deposition? - Wind, Water, and Gravity . Badlands topography with terraces. Types of streams in Arid and semi-Arid locales Exotic streams - begin in areas that are not arid and flow into the desert.

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Arid region geomorphology... What causes the erosion and deposition? - Wind, Water, and Gravity

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  1. Arid region geomorphology... What causes the erosion and deposition? - Wind, Water, and Gravity

  2. Badlands topography with terraces

  3. Types of streams in Arid and semi-Arid locales Exotic streams- begin in areas that are not arid and flow into the desert. Ex. Nile River, Colorado River, Okavango River Local streams (Arroyos) - begin in the arid region, and often end there as well. There are many streams of this type…

  4. A dry stream channel (arroyo) Note the scale of the boulders

  5. Nile River- An exotic stream

  6. Colorado River-Dammed

  7. Alluvial fans & Bajadas in Death Valley Graben

  8. Playa lake, Owens Valley, CA

  9. Sand Dunes in Colorado Great Sand Dunes National Monument

  10. Star Dune in Mexico

  11. Star Dune

  12. Linear Dunes With an exotic stream wind

  13. Barchanoid dunes with smaller transverse & barchanoid dunes superimposed on them

  14. Transverse dunes in Namibia- oblique aerial view

  15. Transverse dunes in Namibia- ground view

  16. Barchan dunes Wind direction Slip face

  17. Barchan dunes Wind direction

  18. Parabolic dunes -on a topo map

  19. Parabolic dunes

  20. Erosional landforms vs. Depositional landforms Erosional forms include... Pediment - bedrock ramp that leads up to the mountain front Plateau- large flat undeformed area that is topographically higher than the surrounding region Mesa- Smaller than the plateau, but basically the same feature Buttes- smaller than the Mesa, but basically the same feature Spires (a.k.a. Hoodoos)- smaller than the buttes

  21. Piedmont in Colorado Piedmont is a geographic designation relating to the slope and or foothills leading to a mountain range

  22. Colorado Plateau with Grand Canyon

  23. A Mesa

  24. Buttes and Spires in Monument Valley, Utah

  25. Spires, Hoodoos, goblins...

  26. Yardangs on Mars

  27. Yardang

  28. Boulders (foreground) collected from desert pavement (background)

  29. Desert Pavement and Desert Varnish

  30. Ventifact

  31. ventifacts

  32. Walking Boulders

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