12-1-08 - Geography 1111 12/1/08 Wind and Arid Landscapes...

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Geography 1111 12/1/08 Wind and Arid Landscapes 1. Wind erosion and deposition 2. Arid Landscapes a. Basic features b. Basin and range topography c. Slope processes Wind Erosion Wind erosion is a fluid medium, like water, but less dense. Wind limited to high winds, exposed surfaces (bare ground). Wind erosion occurs in sparsely vegetated terrain: o Arid landscapes (open terrain) o Geomorphically active settings Coastlines dunes Volcanic ash Glacial forelands o Agricultural fields, cleared land Wind Transport Dust storms and sandstorms common in dry regions o Oklahoma Panhandle-1935, Dust Bowl Wind Deposition Sand dunes o Unvegetated arid lands o Ocean/lake shores o Rippled sand is made by wind o Great Sand Dunes National Park and Preserve, Colorado o Heavier minerals in darker sand—the heavier layers Loess: wind-blown silt from glacial-era drainages o Accumulates down wind from major rivers o Loess bluffs-eat side of Mississippi River o Loess plains-Midwestern U.S., China
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This note was uploaded on 01/17/2011 for the course GEOG 1111 taught by Professor Hopkins during the Fall '08 term at University of Georgia Athens.

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12-1-08 - Geography 1111 12/1/08 Wind and Arid Landscapes...

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