Chapter 15

Chapter 15 - Chapter 15: Eolian Processes and Arid...

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Chapter 15: Eolian Processes and Arid Landscapes I. Introduction I.a. Wind=agent of geomorphic change, like water but less dense and can cause erosion, transportation, and deposition of materials I.a. Contributes to soil formation in distant places by bringing fine particles from regions where glaciers were active I.b. Spreads living organisms (mosses, liverworts, lichens) I.c. In desert environments (including polar regions), wind can create extensive sand seas and dunes b/c of lack of moisture and stabilizing vegetation I. The Work of Wind I.a. Eolian : refers to work of wind (erosion, transportation, and deposition) I.a. Ability to move materials is small compared to other agents like water and ice b/c of lower density, but still significant I.a. Importance of grain size: I.a.i. Intermediate-sized grains move most easily, they bounce along I.a.i. Large particles are heavier and need stronger winds I.a.i. Small particles are difficult to move b/c of mutual cohesiveness and presentation of a smooth (aerodynamic) surface to wind I.a.i.1. But finest dust, once aloft, can be carried from continent to continent I.a. Eolian Erosion I.a.i. Two principal wind-erosion processes that produce a variety of distinctive landforms and landscapes:
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Chapter 15 - Chapter 15: Eolian Processes and Arid...

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