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

11. Sand Dunes in Colorado Great Sand Dunes National Monument

12. Star Dune in Mexico

13. Star Dune

14. Linear Dunes
With an exotic stream
wind

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

16. Transverse dunes in Namibia- oblique aerial view

17. Transverse dunes in Namibia- ground view

19. Barchan dunes
Wind direction
Slip face

20. Barchan dunes
Wind direction

21. Parabolic dunes -on a topo map

22. Parabolic dunes

24. 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

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

26. Colorado Plateau with Grand Canyon

27. A Mesa

28. Buttes and Spires in Monument Valley, Utah

29. Spires, Hoodoos, goblins...

30. Yardangs on Mars

31. Yardang

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

33. Desert Pavement and Desert Varnish

34. Ventifact

35. ventifacts

36. Walking Boulders