hanging valley

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Related to hanging valleys: glacial trough

hanging valley

Geography a tributary valley entering a main valley at a much higher level because of overdeepening of the main valley, esp by glacial erosion

Hanging Valley

 

a valley whose floor ends with a drop to the floor of another, larger valley or to the shore of a sea or lake.

Hanging valleys are formed by the significant differences in the erosive forces of water currents of the main valley and the valley of a tributary, as a result of which the cutting of the tributary lags behind the deepening of the valley of the main river. On sea and lake shores hanging valleys arise because the water-current erosion is slower than the destruction of the shore by surf. The occurrence of a hanging valley can also be connected with sharp changes in the basis of erosion, tectonic movements, a rapid decrease in the level of a reservoir, and differences in the lithology of the washed rocks; in mountain regions, hanging valleys may be connected with the varying speed of valley deepening by glaciers.

hanging valley

[′haŋ·iŋ ¦val·ē]
(geology)
A valley whose floor is higher than the level of the shore or other valley to which it leads.
References in periodicals archive ?
The deep cwmoedd (glaciated valleys) range from the easily accessible to hanging valleys reachable only by complicated scrambling.
Here, high hanging valleys and glacial lakes lie in stark contrast to the rocky, tundra-covered slopes.
It's one of a series of hanging valleys that cut into the western face of the Carneddau.
These variations would have created distinct, high-altitude cirques, hanging valleys and deepened the main valley.