1013-001%2013%20-%20Ch%203%20Weathering%20%26%20Mass%20Wasting0

1013-001%2013%20-%20Ch%203%20Weathering%20%26%20Mass%20Wasting0

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GEO 1013 Third Planet Ch 3 - Weathering & Mass Wasting
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Weathering and Erosion Weathering – processes that decompose  Weathering – processes that decompose  rocks into sediments rocks into sediments Mechanical (physical) weathering  Mechanical (physical) weathering  – physical  – physical  disintegration without chemical change disintegration without chemical change Chemical weathering  Chemical weathering  – reaction with air/water  – reaction with air/water  creates a product different physically and  creates a product different physically and  chemically chemically    
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Storm waves and sea currents have eroded the foundations of houses in Pacifica,  California.
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Weathering processes are breaking this boulder into smaller fragments. Erosion has not  removed the fragments, so the original shape of the boulder is still visible.
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Weathering loosens a quartz grain from granite. Rain erodes the grain, washing it into  a stream.  The stream transports it and finally deposits the grain on a beach.
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Mechanical Weathering Pressure release fracturing  Pressure release fracturing  – formerly  – formerly  buried rocks expand when uncovered buried rocks expand when uncovered Frost wedging  Frost wedging 
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This note was uploaded on 04/01/2012 for the course GEO 1013 taught by Professor Hefner during the Spring '07 term at Texas San Antonio.

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1013-001%2013%20-%20Ch%203%20Weathering%20%26%20Mass%20Wasting0

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