glacial trough
1glacial trough — see glacial valley …
2glacial landform — ▪ geology Introduction any product of flowing ice and meltwater. Such landforms are being produced today in glaciated areas, such as Greenland, Antarctica, and many of the world s higher mountain ranges. In addition, large expansions of present… …
3glacial valley — ▪ geological formation also called glacial trough stream valley that has been glaciated, usually to a typical catenary, or U shaped, cross section. U shaped valleys occur in many parts of the world and are characteristic features of mountain… …
4glacial valley — (also glacial trough) a broad, flat bottomed (U shaped) valley created by glacial erosion and deposition. The erosion widened, deepened and straightened the original river valley. The deposition created the flat bottom …
5trough — [ geomorphology ] a) Any long, narrow depression in the earth s surface, such as one between hills or with no surface outlet for drainage. b) (not preferred see U shaped valley, mountain valley) A broad, elongate U shaped valley, such… …
6glacial-valley floor — The comparatively flat bottom of a mountain valley predominantly mantled by till but which can grade from glacial scour (scoured rock outcrop) near its head to a thick mantle of till, and ultimately merging with alluvium or colluvium further… …
7glacial-valley wall — The comparatively steep, glacially scoured, concave sides of a u shaped, mountain valley mantled by colluvium with little or no till; (not preferred: colloquial: western USA) sometimes called a trough wall. SW …
8trough bottom — (not preferred) refer to glacial valley floor …
9trough wall — (not preferred) refer to glacial valley wall …
10Laurentian Trough — ▪ submarine trough, North America submarine glacial trough in the eastern continental shelf of North America, the most impressive such feature on Earth. It extends from the mouth of the St. Lawrence River eastward through the Gulf of St.… …
