Process which allows glaciers to erode bedrock surfaces via a three stage progression. In the first stage (a.), meltwater at the base of the glacier seeps into cracks in the bedrock. Once collected in these fractures the water freezes and expands, further fracturing the rocks and making bedrock debris available to the glacier (b). This debris is then removed either by freezing to the bottom of the glacier or by being dislodged by rocks projecting from the bottom of the ice (c).
A process of glacial erosion by which blocks of rock are loosened, detached, and borne away from bedrock by the freezing of water in fissures.
The process of glacial erosion by which large rock fragments are loosened by ice wedging, become frozen to the bottom surface of the glacier, and are torn out of the bedrock and transported by the glacier as it moves. The process involves the freezing of subglacial meltwater that seeps into fractures and bedding planes in the rock.
The mechanical removal of pieces of rock from a bedrock face that is in contact with glacier ice. Blocks are quarried and prepared for removal by the freezing and thawing of water in cracks, joints, and fractures. The resulting pieces are frozen into the glacier ice and transported. --------------------------- Q-R Remnant An isolated melting mass of glacier ice, that has become detached from its source and the remainder of the glacier. Some remnants cover many square miles.
erosion process carried out by glaciers. Water enters cracks in rocks , freezes and detaches rock fragment, which become frozen to, and carried away by, the under surface of the glacier as it moves along
Erosive process of particle detachment by moving glacial ice. In this process, basal ice freezes in rock surface cracks. As the main body of the glacial ice moves material around the ice in the cracks is pulled and plucked out. Also called quarrying.
Plucking, in the sense relating to glaciers, is when a glacier erodes away chunks of bedrock to be later deposited as glacial erratics. Glacial plucking exploits pre-existing fractures in the bedrock. When the ice comes into contact with a joint, the friction on the ice results in melting of some of the ice.