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Moraine
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Rocky debris or till carried along and deposited by a glacier. Material eroded from the side of a glaciated valley and carried along the glacier's edge is called a lateral moraine; that worn from the valley floor and carried along the base of the glacier is called a ground moraine. Rubble dropped at the snout (front end) of a melting glacier is called a terminal moraine.
When two glaciers converge their lateral moraines unite to form a medial moraine. Debris that has fallen down crevasses and becomes embedded in the ice is termed an englacial moraine; when this is exposed at the surface due to partial melting it becomes an ablation moraine.
© Research Machines plc 2008. All rights reserved. Helicon Publishing is a division of Research Machines plc.
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