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15 Cards in this Set
- Front
- Back
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Denudation (lowering of the surface of continents) is accomplished by what 3 things?
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Weathering, Mass Wasting, Erosion
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Weathering agents include:
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Water, Air, Plant roots
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What are 5 types of Rock Openings?
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Joints, Faults, Lava vesicles, and solution cavities
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Weathering Agents (most are atmospheric) include:
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Temperature(freezing and thawing), Water(most important), and Biotic Agents(burrowing animals, plant roots, production of chemicals erode rock
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2 types of weathering and define:
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Mechanical Weathering and Chemical Weathering
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Fragmentation of rock due to expansion of water that freezes in rock openings
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Frost Wedging (it expands by 10% when it freezes)
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Rock disintegration caused by the crystallization of salts from evaporating water
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Salt Wedging (mostly in arid areas)
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Biotic activities in mechanical weathering include:
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Burrowing animals, plant roots, and lichens
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3 most common Chemical weathering agents include:
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Oxygen, water, and carbon dioxide
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Chemical union of water with another substance to produce a new compound
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Hydrolysis (produces softer compounds)
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The downslope movement of broken rock material by gravity and sometimes by the presence of water
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Mass Wasting
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Where does mass wasting occur?
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after the angle of repose has been compromised
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The steepest angle that can be assumed by loose fragments on a slope without downslope movement
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Angle of repose (dump truck and sand castle illustration)
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What is mass wasting prompted by?
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accumulation of material, addition of water, clay, and heaving of frozen groundwater
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What are the 4 general types of mass wasting? Define.
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Fall, Slide, Flow, Creep
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