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Geography

Which outcome accelerates glacial ice advance when basal debris concentrates?

A)Increased basal sliding velocity
B)Decreased serac formation rate
C)Reduced marginal crevassing depth
D)Diminished abrasion of bedrock

💡 Explanation

Increased debris concentration at the glacier's base leads to enhanced basal sliding because Regelation causes meltwater films to facilitate ice movement over uneven surfaces; therefore, forward motion increases, rather than abrasion decreasing which is a different process.

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