Chemical Weathering and Soils
Chemical Weathering and Soils Fresh rocks and minerals that once occupied the outermost position reached
their present condition of decay through a complex of interacting physical, chemical, and biological processes, collectively called weathering.
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Chemical Weathering and Soils 1. new minerals created by the weathering processes, 2. minerals that resisted destruction, and 3. organic debris added to the weathering zone.
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Chemical Weathering and Soils Functions of weathering
? gives rock lower strength and greater permeability, ? produces minor landforms, ? releases minerals in solution, ? Is first step in soil formation.
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Chemical Weathering and Soils
Decomposition - group of processes that attempt to create substances that are more nearly stable in that environment.
? Driving force for decomposition is water.
H20 + CO2
H2CO3
? How materials weather is related to how easily ions are released.
? sites of excess energy
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Chemical Weathering and Soils Processes of Decomposition Oxidation and Reduction
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