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How does a glacier remain stationary?
Glaciers that are neither advancing nor receding are stationary. The snout (or terminus) of a glacier may be stationary, but the ice itself isn’t. The terminus of a glacier is stationary when accumulation (snow) at the top of the glacier is equal to ablation (melt) at the bottom of the glacier.
Under what conditions will the front of the glacier remain stationary?
Terms in this set (7) Under what conditions will the front of a glacier remain stationary? Glacial fronts remain stationary when melting and snow accumulation are equal.
What part of the glacier involves abrasion and plucking?
Plucking occurs when rocks and stones become frozen to the base or sides of the glacier and are plucked from the ground or rock face as the glacier moves. This leaves behind a jagged landscape. Abrasion occurs when rocks and stones become embedded in the base and sides of the glacier.
How would a snow line on a glacier move as a Glacial front is advancing how would a snow line on a glacier move as a Glacial front is advancing?
How would a snow line on a glacier move as a glacial front is advancing? The snow line would move downslope. The glacier’s front would move forward, backward, and then forward again.
How does a glacier advance?
Glaciers advance and retreat. If more snow and ice are added than are lost through melting, calving, or evaporation, glaciers will advance. If less snow and ice are added than are lost, glaciers will retreat. In this zone, the glacier gains snow and ice.
What happens when glaciers move?
One component of glacier flow is the deformation of the ice itself. This happens at a microscopic scale, as movement occurs within and between individual ice crystals. They can slide past each other, break and deform, and recrystallize to form new grains.
Why is the ice front of a glacier not necessarily stationary?
A glacier is thinnest at the elevation where the ice melts as fast as it moves. A glacier that loses most of its ice through melting ends here, at its ice front—the end of the glacier. A glacier always moves forward. As long as the rates of movement and melting are equal, the ice front is stationary.
What will happen to the crust as a glacier grows?
What will happen to the crust as a glacier grows? The crust under the glacier will sink into the mantle. This allows mantle on either side of the glacier to move to areas under the glacier.
What is plucking caused by?
Plucking is caused when sediments are picked up by a glacier. They freeze to the bottom of the glacier and are carried away by the flowing ice. The ice contains sediments and rocks frozen in the ice. The rocks and sediment grind away as the glacier moves.
How does the process of plucking cause erosion?
Erosion by Glaciers Plucking is caused when sediments are picked up by a glacier. They freeze to the bottom of the glacier and are carried away by the flowing ice. The rocks and sediment grind away as the glacier moves. They wear away rock.
What is an advancing glacier?
when a mountain glacier’s terminus extends farther downvalley than before; occurs when a glacier flows downvalley faster than the rate of ablation at its terminus. glaciers.