icrais Tisted above. 3. Look for a grain of biotite in the sand. Based on what y

Question

icrais Tisted above. 3. Look for a grain of biotite in the sand. Based on what you learned about mineral weathering in this lab, what two weathering processes affect biotite, and what are the weathering products of each (i.e., what new minerals are formed as biotite is weathered)? Weathering Process Affecting Biotite Weathering Product (New Mineral) 4. Because biotite weathers easily, what does the presence of biotite in this sand suggest about how much these grains have been weathered and how far they have been transported? Circle the correct answer below (a or b). a. Heavily weathered and/or transported far from the source area. b. Not weathered much and not transported far from the source area.

Explanation / Answer

Biotite weather by hydrolysis into kaolinite and release iron, potassium and magnesium into the surrounding soil as nutrients.

4. Heavily weathered and/or transported far from the source area.

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