Glacial abrasion is the process by which a glacier grinds down bedrock surfaces, using debris embedded in the ice as abrasive tools. This process creates striations, grooves, and polished surfaces, and plays a significant role in shaping glaciated landscapes. Studying glacial abrasion helps geologists understand past ice flow dynamics and erosion rates.
Source Boulton, G. S. (1974). Processes and Patterns of Glacial Erosion. Progress in Physical Geography.