What is crevasse geology?

A crevasse is a deep, wedge-shaped opening in a moving mass of ice called a glacier. Crevasses usually form in the top 50 meters (160 feet) of a glacier, where the ice is brittle. 6 – 12+ Earth Science, Geography, Geology, Physical Geography.

What is a crevasse What causes them?

A crevasse is a crack in the surface of a glacier caused by extensive stress within the ice. For example, extensive stress can be caused by stretching if the glacier is speeding up as it flows down the valley. Crevasses can also be caused by the ice flowing over bumps or steps in the bedrock.

What is a crevasse in a glacier?

Crevasses are cracks that form in glacier ice when the glacier is put under too much stress for it to deform by flowing.

What is a crevasse crevice?

A crevasse is a deep crack, crevice or fissure found in an ice sheet or glacier, or earth. Crevasses form as a result of the movement and resulting stress associated with the shear stress generated when two semi-rigid pieces above a plastic substrate have different rates of movement.

What causes a crevasse to form quizlet?

What causes a crevasse to form? When ice flows around a bend or over an obstacle, it is stretched and torn, causing large cracks to form.

How do crevasses form in glaciers quizlet?

when a valley glacier comes to a steep slope, cracks called crevasses form. They form because the ice near the surface of the glacier is rough and rigid. The ice responds to the movement of the ice underneath it by breaking.

Is a crevice a hole?

A crevice is a narrow opening resulting from a split or crack.

Which is a type of crevasse?

Glaciers, ice shelves, snow fields and sea ice are subjected to stresses which are relieved by fissures and cracks called crevasses.

Why do crevasses form in the upper portion of glaciers?

Crevasses form on the upper portion of the glacier because when a glacier moves over irregular terrain, the zone of fracture is subjected to tension, which forms the crevasse.

What is a glacial crevasse quizlet?

Glacial Crevasses. A crevasse is a deep crack, or fracture, found in an ice sheet or glacier, as opposed to a crevice that forms in rock.