The diagram to the left shows the changes down a river valley before and after After ice retreat many glacial troughs were filled with shallow lakes which were. They over-steepen the walls around them, as they do when carving u-shaped valleys. Today ice sheets are only found in Greenland and in Antarctica. Because a glacier … The sides of mountains prevent valley glaciers from spreading in all directions as continental glaciers do. As they move, they can spread out in all directions. Smaller glaciers called tributary glaciers flow down the valley and connect to the main glacier As the glacier has a smaller volume, the glacier is not able to erode as much as the main glacier When the glaciers retreat, the valley which contained the tributary glacier is left expose, it is often mid way up the glacier trough. Valley glaciers sometimes flow through narrow inlets (fjords) into the ocean. A diagram showing erosional glacial features, as follows: 1 is a Pyramidal Peak; 2 is an Arête; 3 is a Corrie or Cirque; 4 is a Corrie Lochan or Tarn; 5 is an Alluvial Fan; 6 is a Ribbon Lake; 7 is a Truncated Spur; 8 is a Misfit Stream; 9 is a Hanging Valley; 10 is a 'U' Shaped Valley When allowed to spread out, a glacier erodes the landscape uniformly, but when confined within valley walls it tends to deepen and widen the valley floor. However, when glaciers flow down these same valleys, they change the landscape. Hanging - Hanging glaciers form on the side of a mountain above a glacial valley. When the glacier melts, a U-shaped valley marks the spot where the snow and ice once flowed. In the diagram in this section that shows what happens when a glacier surges, look at letter B and find out what it’s about. Thus, fjords have tall, steep walls like glacial valleys, but their floors are below sea level and thus are inundated with ocean water. In glacial landform: Hanging valleys. Draw a diagram of shearing at the side of a glacier. As the glaciers move down the valley they scrape away the sides to make it more rounded and wider than it was previously. On this diagram, draw a line beginning at X and ending at Y to show the shape of this valley after it was eroded by glacial ice that flowed down the valley. [1] August 2012 17 The block diagram below shows part of a meandering stream. Because of its greater ice discharge, the trunk glacier has greater erosive capability in its middle and lower reaches than smaller tributary glaciers… Continental glaciers can cover most of a continent or large island. Doing so creates a large U-shaped valley. In a surge, can a glacier swallow its own valley? Ice cap - An ice cap is formed when ice completely covers an area of land such that no part of the land, not even mountain peaks, poke through the top of … The next figure is a diagram of kinds of crevasses created by stresses within glaciers. Side valleys are formed by tributaries to streams and rivers and feed the main stem. Large valley glacier systems consist of numerous cirques and smaller valley glaciers that feed ice into a large trunk glacier. 9. Mountain glaciers. When a glacier erodes its valley, a classic U shape is formed, the side walls tending to be steep and U shaped valleys are also known as glacial troughs. 65 The diagram below shows a partial cross section of a valley near location A on map III. In contrast, valley glaciers move down mountain valleys previously cut by rivers. Here is a diagram that shows the evidence of glaciers in the … The largest mountain glaciers are found in Arctic Canada, Alaska, the Andes in South America, and the Himalaya in Asia.. Valley glaciers. A valley glacier is confined to a valley and flows from a higher to a lower elevation. Look closely. 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