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← GeographyWhich horizon ordering indicates stalled pedogenesis under permafrost?
A)O-A-Bw-C-R, active soil profile
B)O-Oe-A-E rusted iron band
C)O-Fibric-E saturated-B stagnant✓
D)A-Bt-C enriched clay horizon
💡 Explanation
A fibric horizon over saturated E indicates permafrost cryoturbation because freeze-thaw inhibits decomposition and mixes undifferentiated material. Therefore the soil profile remains truncated and immature rather than developing distinct Bw horizons from weathering.
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