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← GeographyWhich outcome occurs when increased rainfall intensifies chemical weathering within granite?
A)Cation depletion in upper soil horizons✓
B)Reduced hydraulic conductivity near bedrock
C)Enhanced aggregation of clay minerals
D)Increased soil organic matter retention
💡 Explanation
Increased rain causes increased feldspar weathering and cation leaching. The mechanism is solution weathering, whereby ions are carried away from zones of reaction. Topsoil depletion increases, because dissolved ions leave upper horizons rather than enriching soil or bedrock.
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