arid landforms

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Post on 16-May-2015

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Overview of arid landforms as an intro to the subject area

TRANSCRIPT

  • 1. Arid Landforms

2. Basic Concepts
I. Most deserts exhibit highly angular landscapes.

  • mechanical weathering dominates

3. angular particles of weathered rock; bedrock outcrops 4. little soil or vegetation to soften landscape II. Softer, more rounded landscapes appear where deposition is predominant.

  • dunes

III. Desert rainfall is infrequent, intense, and unreliable.

  • intense flash flooding, intense erosion

5. ephemeral streams