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← GeographyWhich outcome occurs when meltwater influx disrupts fjordic basin ventilation?
A)Anoxic zone formation expands greatly✓
B)Nutrient upwelling increases significantly
C)Thermocline mixing becomes far stronger
D)Sediment slumping events reduce drastically
💡 Explanation
Anoxic zone formation expands because stratification strengthens, hindering the overturn that normally replenishes oxygen via basin ventilation; therefore, bottom water oxygen declines substantially, rather than increasing mixing or nutrient availability.
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