moraine
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A glacier picks up large boulders and rock debris from the valley and deposits them at the snout of the glacier when the ice melts. Some deposited material is carried great distances by the ice to form erratics.
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.
Moraine
| City in Montgomery County, southwestern Ohio; population (1990) 6,000. This industrial suburb is situated on the Great Miami River, 8 km/5 mi south of Dayton. A General Motors truck assembly plant is located here. |
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