... glacier A long, relatively narrow ribbon of ice that is confined between valley...
... glacier A long, relatively narrow ribbon of ice that is confined between valley walls. The Alpine type is fed by a series of cirque glaciers that show positive net balances ( see mass balance ), and is common in the Alps and in the coastal mountains of Alaska, USA. The outlet type is fed by an ice cap or ice sheet. The Vatnajökull ice cap in Iceland feeds several outlet glaciers...
A long, relatively narrow ribbon of ice that is confined between valley walls. The Alpine type is fed by a series of cirque glaciers that show positive net balances (see mass balance), and is common ...
Michael D. Coogan
...transverse valleys that lead through them from the coast to the Rift Valley.
Next comes the Rift Valley itself, a deep gouge in the earth's surface that extends over 6,500 kilometers (4,000 miles) from southern Turkey into East Africa. The Orontes River Valley in Syria, the Biqa in Lebanon, the Jordan Valley, the Arabah, and the Red Sea are all parts of this gash, which reaches its lowest point where the Jordan ends, at the Dead Sea—the lowest elevation on the entire surface of the earth. The descent from the hills to the Rift Valley is abrupt....
A glacier which forms in an area of mountains. Also known as alpine glacier or valley glacier. Contrast ice cap, ice sheet.
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 ...
A valley that is or was occupied and shaped by a glacier. See also U‐shaped valley.
A glacier formed from the merger of several alpine glaciers as they emerge from the mountains; see Hall and Denton (2002) Holocene 12.
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 ...
A deep valley with steep sides and a flat floor, usually eroded by a glacier. Also known as glacial trough. Contrast v‐shaped valley.
A type of moraine that is deposited at the side of a valley glacier, often composed of rock particles that have fallen off the sidewalls of the valley as a result of frost wedging.
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 ...
An accumulation of fluvioglacial deposits laid down in a valley by meltwaters escaping from a decaying glacier. The surface slopes quite steeply down-valley, and is incised by shifting braided ...
A glacier flow in glaciers with steady velocity almost to the edges, then falling sharply, creating a highly erosive, strong shear force near the valley walls. The lower threshold of Blockschollen ...
A type of moraine that forms in the centre of a glacier or ice stream downstream from the confluence of neighbouring valleys, where adjacent lateral moraines join together.
In geomorphology, a type of dynamic system characterized by the transfer of mass and energy along a chain of component sub-systems, such that the output from one sub-system becomes the input for the ...
The processes of erosion that are associated with glaciers and ice sheets, which include quarrying and abrasion. See also U‐shaped valley.
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 ...
The steep rock slope at the head of a cirque or valley glacier. It is a site of active erosion, perhaps by frost wedging.
Tributary valley whose floor is well above that of the adjacent main valley and where there is therefore often a waterfall. It is typical of glaciated uplands, where it may result from glacial ...
