Glacial valleys have a _______structure
Answers
Answer:
U-shaped
Explanation:
Valley glaciers carve U-shaped valleys, as opposed to the V-shaped valleys carved by rivers. During periods when Earth's climate cools, glaciers form and begin to flow downslope.
What are glacial structures?
Longitudinal surface structures (may be called longitudinal foliation or flow stripes) are common on glaciers and have a planar or layered structure that develops in ice during ice flow. The layers are characterised by variations in the ice crystals (e.g., coarse-clear and white bubble-rich).
How are U-shaped valleys formed by glaciers?
It tears away huge rocks from the sides and base of the valley. The glacier freezes onto the surrounding rocks previously weakened by freeze-thaw, by a process known as plucking. Thus changing the valley into a U-shape by steepening them. The erosive power of the glacier over deepens the valley floor.
Answer:
glacial valleys have a ___structure