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Process of wastage of snow or ice, especially by melting

Amount of accumulation and ablation are equal over the course of a year

Short-lived phase of accumulation glacier flow

Temperature at which ice under pressure will melt

Extension and related thinning of glacier ice in those zones where velocity increases

Type of glacier flow whereby a reduction in velocity leads to an increase in thickness of a glacier

Breakdown of rocks in situ (in their original location, without them being moved away)