Arid Landscapes. Arid and Humid Weathering Compared Humid ClimatesArid Climates RainfallFrequentRare, May Be Seasonal, Often Violent Soil CoverThickThin.

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Presentation transcript:

Arid Landscapes

Arid and Humid Weathering Compared Humid ClimatesArid Climates RainfallFrequentRare, May Be Seasonal, Often Violent Soil CoverThickThin or Absent VegetationThickSparse-no Continuous Cover Chemical Weathering IntenseWeak Overall Landscape Evolution Mostly Uniform Processes Episodic Processes

Arid Erosion Cycle: Youth V-shaped Valleys Divides Flat, Undissected Much Like Youth in Humid Climates

Youthful Landscape, Arizona

Arid Erosion Cycle: Maturity Slopes Stay Steep, Retreat Alluvial Fans Playa Lakes Pediments

Alluvial Fans, Utah

Mature Arid Landscape

How Pediments Form

Arid Erosion Cycle: Old Age Inselbergs Playa Lakes Pediplain

Old Arid Landscape

Monument Valley, Arizona

Playa Lake, California

Great Salt Lake, Utah

Closed Basins are Typical of Arid Regions

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