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cascade effect
A sequence of events in which each produces the circumstances necessary for the initiation of the next.1 In ecology, a succession in which the organisms present at one stage provide resources that ...
glacier
A mass of ice which may be moving, or has moved, overland: when enough ice has accumulated, a glacier will start to move forwards. A glacier may be seen to be the result of a balance between ...
glacier surge
A relatively rapid movement of a valley glacier, or of an individual ice stream within a major ice sheet. The movement may build up over a period ranging from a few months to several years and may be ...
headwall, glacial
The steep rock slope at the head of a cirque or valley glacier. It is a site of active erosion, perhaps by frost wedging.
piedmont glacier
A glacier formed from the merger of several alpine glaciers as they emerge from the mountains; see Hall and Denton (2002) Holocene 12.
riegel
A rock bar that extends across the floor of a glacial trough. It may be caused by a local reduction in the erosive ability of a valley glacier or by a local increase in bedrock strength, perhaps ...
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