Chap15_masswasting_sakai

Chap15_masswasting_sakai - Biological Weathering...

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Biological Weathering Decomposition and weakening of rock by living organisms! Plant roots expand rock cracks Plants release organic acid Burrowing animals weaken rock
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Biological Weathering: Root Action -Roots grow into rock openings - breaking rocks into small pieces - makes rock vulnerable to more weathering such as frost wedging
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Biological Weathering: Root Action Rock openings are expanded by growing roots
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Biological Weathering: Acidity Plants can heighten acidity (producing a weak carbonic acid) and weaken the rock increasing the likelihood of chemical or physical weathering.
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Relationship between Weathering and Atmosphere Wet and warm conditions = rapid and deep weathering Moisture is usually more important than temperature
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Denudation Lowering of continental surfaces through Weathering disintegration in place Mass wasting disintegration and short distance down slope movement Erosion disintegration and long distance transport
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Mass Wasting Short distance downward movement of weathered material under the influence of gravity, causing a lowering of the land surface by redistribution of mass
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This note was uploaded on 10/16/2011 for the course GEOGRAPHY 101 taught by Professor Vancura during the Spring '08 term at Rutgers.

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Chap15_masswasting_sakai - Biological Weathering...

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