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Glacial Landscapes - Coggle Diagram
Glacial Landscapes
Red Tarn
Red Tarn is an example of a corrie on the eastern side of the summit of Helvellyn. It has the following distinctive features:
steep back wall, created by freeze-thaw weathering and plucking
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Case Study - Lake District, England
Helvellyn stands is one of England's highest mountain, standing at 949 metres above sea level in the Lake District in north-west England. It is made up of igneous rocks which were formed 450 million years ago.
Many of the landscape features visible around Helvellyn today were formed during the last ice age over 20,000 years ago. Large glaciers dominated the landscape and through their erosive power, carved out classic glaciated landforms such as arêtes, corries and glacial troughs
Helvellyn is a mountain, which contains several glacial landforms. Two arêtes ascend to the summit of Helvellyn, Striding edge and Swirral edge. Striding Edge forms the back wall of the Red Tarn corrie.
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Glacial Melt Water
As the glacier melts, the water carries fine material which is eventually deposited. All of the material moved by the glacial melt water is called glacial drift or glacial till. Glacial outwash is the sand and gravel deposited by the running melt water leaving the glacier. The material is sorted. The heavier particles of sand and gravel are deposited in the glaciated valley. The lighter, finer particles such as clay, are deposited further away from the glacier and are deposited in the outwash plain.