Video review 5: Landscapes formed by glacial erosion Watch the video by Wendy Va
ID: 106046 • Letter: V
Question
Video review 5: Landscapes formed by glacial erosion Watch the video by Wendy Van Norden in the study forum below. In this video, you will see landscape features formed by glaciers.Write a brief review of this video. Using the video and your text, address these questions in your review:
Describe how a valley glacier carves out its valley. What processes are involved?
Identify these features, and describe how they are formed: cirques, tarns, arêtes, horns, paternoster lakes.
Why are some valley glaciers referred to as hanging glaciers?
How are fiords formed?
Please watch this YouTube video to write your review . Landscapes formed by glacial erosion by Wendy Van Norden
https://www.youtube.com/watch?v=q63r52hG2mk
Video review 5: Landscapes formed by glacial erosion Watch the video by Wendy Van Norden in the study forum below. In this video, you will see landscape features formed by glaciers.
Write a brief review of this video. Using the video and your text, address these questions in your review:
Describe how a valley glacier carves out its valley. What processes are involved?
Identify these features, and describe how they are formed: cirques, tarns, arêtes, horns, paternoster lakes.
Why are some valley glaciers referred to as hanging glaciers?
How are fiords formed?
Please watch this YouTube video to write your review . Landscapes formed by glacial erosion by Wendy Van Norden
https://www.youtube.com/watch?v=q63r52hG2mk
Video review 5: Landscapes formed by glacial erosion Watch the video by Wendy Van Norden in the study forum below. In this video, you will see landscape features formed by glaciers.
Write a brief review of this video. Using the video and your text, address these questions in your review:
Describe how a valley glacier carves out its valley. What processes are involved?
Identify these features, and describe how they are formed: cirques, tarns, arêtes, horns, paternoster lakes.
Why are some valley glaciers referred to as hanging glaciers?
How are fiords formed?
Please watch this YouTube video to write your review . Landscapes formed by glacial erosion by Wendy Van Norden
https://www.youtube.com/watch?v=q63r52hG2mk Landscapes formed by glacial erosion by Wendy Van Norden
https://www.youtube.com/watch?v=q63r52hG2mk
Explanation / Answer
As tectonic plates collided in the region to build up the region's mountains, a glacier slowly flowed downhill, gouging out a valley in the landscape. For the first million years, most of the land carving happened at the mouth of the glacier the end furthest downhill. Then, for the next million years, erosion occurring uphill took over as the primary rock mover and shaker. Erosion ate into the glacier's headwalls, creating the razorback ridges that surround a glacial valley at its mountainous end.
"Apparently, the heads of glaciers would be directly opposite one another on either side of a high ridge, and faster erosion at the headwalls caused the glaciers to eat their way inward to the spine of the mountain range, farther from the glacier's outlet
cirques are mountain valley heads which have been shaped into deep hollows by the erosion of small glaciers. In Britain, many corries were last filled by glacier ice around 12, 000 years ago but these corries have held glaciers on many occasions during the last 2.4 million years. In high mountains elsewhere in the world cirques hold glaciers today. This allows presently-acting processes to be related to the landforms exposed on British corrie floors on the now exposed beds of former glaciers.
tarn (or corrie loch) is a mountain lake or pool, formed in a cirque excavated by a glacier. It is formedwhen either rain or river water fills the cirque. A moraine may form a natural dam below a tarn
arête is a narrow ridge of rock which separates two valleys. It is typically formed when two glaciers erode parallel U-shaped valleys. Arêtescan also form when two glacial cirques erode headwards towards one another, although frequently this results in a saddle-shaped pass, called a col
horn results when glaciers erode three or more arêtes, usually forming a sharp-edged peak
Paternoster lakes occur in alpine valleys, climbing one after the other to the valley's head, called a corrie, which often contains a cirque lake.Paternoster lakes are created by recessional moraines, or rock dams, that are formed by the advance and subsequent upstream retreat and melting of the ice.
When a major valley glacier system retreats and thins, sometimes the tributary glaciers are left in smaller valleys high above the shrunken central glacier surface. These are called hanging glaciers. If the entire system has melted and disappeared, the empty high valleys are called hanging valleys.
fjord is formed when a glacier retreats, after carving its typical U-shaped valley, and the sea fills the resulting valley floor. This forms a narrow, steep sided inlet (sometimes deeper than 1300 metres) connected to the sea
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