What is the top of a glacier called?
glacier head
A glacier head is the top of a glacier. Although glaciers seem motionless to the observer they are in constant motion and the terminus is always either advancing or retreating.
What is the name for the process in which a glacier flows over the land and picks up rocks?
plucking
As a glacier flows over the land, it picks up rocks in a process called plucking. Plucking can move even huge boulders. Many rocks remain on the bottom of a glacier, and the glacier drags them across the land. This process, called abrasion, gouges and scratches the bedrock.
What is the head of a glacier called?
A glacier originates at a location called its glacier head and terminates at its glacier foot, snout, or terminus. Glaciers are broken into zones based on surface snowpack and melt conditions. The ablation zone is the region where there is a net loss in glacier mass.
What is a glacial ridge?
Glacial Ridge is a glacial kame that formed west of the Valparaiso Moraine. They’re formed when a stream of meltwater deposits material into cracks or holes in the ice of the melting glacier.
What is an active glacier?
[′ak·tiv ′glā·shər] (hydrology) A glacier in which some of the ice is flowing.
What was deposited by the glaciers?
A moraine is sediment deposited by a glacier. A ground moraine is a thick layer of sediments left behind by a retreating glacier. An end moraine is a low ridge of sediments deposited at the end of the glacier.
What is a glacial trough in geography?
Glacial troughs, or glaciated valleys, are long, U-shaped valleys that were carved out by glaciers that have since receded or disappeared. Troughs tend to have flat valley floors and steep, straight sides. Fjords, such as those in Norway, are coastal troughs carved out by glaciers.
How are glacial arêtes formed?
An arête is a knife-edge ridge . It is formed when two neighbouring corries run back to back. As each glacier erodes either side of the ridge, the edge becomes steeper and the ridge becomes narrower. Glaciers erode backwards towards each other, carving out the rocks by plucking and abrasion.