The process that causes rock fragments in an alpine glacier to scrape and grind against the bedrock is referred to as:

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Glacial abrasion is the process through which rock fragments in a glacier scrape and grind against the bedrock, causing erosion and smoothing of the underlying surface. Glacial ablation refers to the loss of ice mass due to melting or calving, plucking is the removal of rock fragments by glaciers, and quarrying is the breaking off of large blocks of rock by a glacier. Glaciation refers to the formation and expansion of glaciers.

The Process That Causes Rock Fragments in an Alpine Glacier