EVSC 2800 Lecture Notes - Lecture 11: Clay Minerals, Silicic Acid, Kaolinite
18 Feb 2016
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Figures 16. 4 (chemical weathering part, but not emphasis on climate), 16. 5, 16. 10**, Key terms chemical stability, kaolinite, soil, soil profile. Soil the unconsolidated mineral or organic material on the immediate surface of the earth that serves as a natural medium for the growth of land plants. Sediment fragmental material transported and deposited by wind, water, or ice, and that forms in layers in unconsolidated form. The presence of organic matter makes the mantle of residue that sits in place on top of weathered bedrock (a soil). Living organisms are crucial to the formation of soil. A soil profile is the vertical sequence of natural layers called horizons in a soil. It extends from the surface downward to unweathered material. The overall weathering reaction can be simplified to granite wathering to form soil. In other words, it is simply feldspar weathering to form clay and dissolved chemicals in soil water.
