TOPIC 2 - TOPIC 2 Weathering and Erosion Weathering...

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TOPIC 2 – Weathering and Erosion Weathering Weathering – the process by which rocks and minerals at the surface of the Earth are broken down into smaller rocks and eventually into soils Erosion – the process of removal of these weathering products Weathering of rocks occurs everywhere, but rates of weathering are uneven. Mechanical Weathering Mechanical weathering processes are those physical processes that cause rock to break or disintegrate into smaller and smaller fragments. Frost Action Water expands when it freezes and wedges adjacent rocks apart when it freezes in cracks.(frost wedging). Frost action is effective in regions with a large number of days with fluctuations in temperatures from above to below freezing (ex. Ohio). Pressure Release Many rocks, originally formed deep in the crust, are brought to the surface by pressure. The rocks expand and form sheet joints, parallel to the surface of the rock, when they reach the surface due to less pressure (ex. Stone Mountain).
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This note was uploaded on 07/16/2008 for the course GLY 1102 taught by Professor Ciesielski during the Summer '08 term at University of Florida.

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TOPIC 2 - TOPIC 2 Weathering and Erosion Weathering...

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