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sw12 - Describing and Evaluating Soils Soil Texture...

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Describing and Evaluating Soils Soil Texture
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Describing and Evaluating Soils Color Texture Density Structure Water Movement Fertility Reactivity Habitat Engineering/Development
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Soil Texture and Weathering Physical and Chemical Alteration and Reorganization of Rocks and Minerals Physical: changing the size and shape of rocks or mineral particles without altering their chemical composition Chemical: altering a mineral particle’s chemical composition.
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Weathering Physical: freezing and thawing plants and biota wind, rain, abrasion Reduce size, Increase surface area } Chemical: hydration hydrolysis oxidation/reduction acids dissolution Chemical Alteration Reorganization } Destruction and Synthesis
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Minerals: quartz, feldspars, biotite Granite
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Rocks and Minerals Limestone Calcite Sandstone Quartz Shale Clays Granite Quartz/Feldspars Basalt Quartz/Feldspars Rock Dominant Mineral
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Quartz Si O 2 Feldspar K AlSi 3 O 8 Biotite KMg 3 AlSi 3 O 10 (OH) 2 Albite Na AlSi 3 O 8 Primary Minerals
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Quartz Si O 2 Feldspar K AlSi 3 O 8 Biotite KMg 3 AlSi 3 O 10 (OH) 2 Albite Na AlSi 3 O 8 Muscovite K Al Si O 10 (OH)
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