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← GeographyWhich pedogenic effect results more rapidly when alternating extreme temperatures cause repeated volumetric change in granite?
A)Increased physical rock weathering✓
B)Elevated chemical anion exchange
C)Reduced clay mineral formation
D)Enhanced soil organic matter retention
💡 Explanation
Increased physical weathering leads to fracturing because thermal stress causes the process of thermal fracturing to break down the rock. Therefore, physical weathering increases, rather than anion exchange which requires water and mobility, or enhanced organic retention needing biota activity.
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