Weathering and Clay Evolution
http://courses.soil.ncsu.edu/resources/soil_classification_genesis/mineral_weathering/mineral_change.swf

Soil Science Department, North Carolina State University

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This annotated animation shows how primary minerals lose content at a linear pace. The site illustrates how primary minerals, 2:1 clays, 1:1 clays, and aluminum and iron oxides develop as a function of time.

Subject: Geoscience:Geology:Mineralogy, Sedimentary Geology:Weathering
Theme: Teach the Earth:Course Topics:Sedimentary Geology, Mineralogy