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.
Reference: Boulton, G. S. (1974). Processes and Patterns of Glacial Erosion. Progress in Physical Geography.