sw2 - The Soil Solid Fraction Solids 5 Pores 25 Air Water...

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The Soil Solid Fraction
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25% 25% 45% 5% Air Water Mineral Organic Solids Pores
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Weathering Physical: freezing and thawing plants and biota wind, rain, abrasion Chemical: hydration hydrolysis oxidation/reduction acids dissolution Reduce Size } Chemical Alteration } Destruction and Synthesis
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Rocks breakdown (weather) by physical means Primary Minerals Primary minerals (e.g. quartz, feldspars) are dominated by Si, Al, O Primary minerals breakdown (weather) principally by chemical means Secondary Minerals Silicate clay minerals are dominated by Si, Al, O Silicate clays Iron oxides Aluminum oxides
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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 O 8 Primary Minerals Aluminum and Silicon
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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) 2 Chemical Alteration and Reorganization Primary Minerals Crystalline Aluminosilcate Clays Dominated by Aluminum, Silicon, Oxygen Chemical weathering Secondary Minerals
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Aluminosilicate Clays
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Aluminosilicate Clays Colloidal 1.Small (< 1 micron) 2.Large surface area 3.Highly reactive
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This note was uploaded on 02/04/2011 for the course SWS 3022 taught by Professor Bonczek during the Spring '11 term at University of Florida.

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sw2 - The Soil Solid Fraction Solids 5 Pores 25 Air Water...

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