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Satellite image of the Cayman Trough Bathymetric features of the Rockall Trough northwest of Scotland and Ireland. In geology, a trough is a linear structural depression that extends laterally over a distance. Although it is less steep than a trench, a trough can be a narrow basin or a geologic rift. These features often form at the rim of ...
A view through a coulee in Alberta, with steep but lower sides, and water in the bottom. Coulee, or coulée (/ ˈ k uː l eɪ / or / ˈ k uː l iː /), [1] is any of various different landforms, all of which are kinds of valleys or drainage zones. The word coulee comes from the Canadian French coulée, from French couler 'to flow'.
Butte – Isolated hill with steep, often vertical sides and a small, relatively flat top; Canyon – Deep chasm between cliffs; Cliff – Tall, near vertical rock face; Col – Lowest point on a mountain ridge between two peaks; Cuesta – Hill or ridge with a gentle slope on one side and a steep slope on the other
In geology a sag, or trough, is a depressed, persistent, low area; the opposite of an arch, or ridge, a raised, persistent, high area. The terms sag and arch were used historically to describe very large features, for example, characterizing North America as two arches with a sag between them. [1]
Trough (barony), a historical barony in County Monaghan, Ireland; Trough (food) or manger, a container for animal feed; Watering trough, a receptacle of drinking water for domestic and non-domestic livestock; Water trough, a trough used to supply water to steam locomotives. Battle of the Trough, a 1756 skirmish of the French and Indian War in ...
(Hill Hill Hill) – "Pen" -(Cumbric language) "Pendle" by epenthesis and elision from "Pen Hyll", the latter word being Old English for "hill". [3] Pendleton, near Pendle Hill, Lancashire, England. (Hill Hill Town) or, possibly (Hill Hill Hill), taking the -ton as deriving from Old English dun as opposed to Old English tun.
In glacial valleys or trough valleys, it may be referred to as the trough head or trough end. [2] In mountains with predominantly crystalline rock the heads of the valleys are generally very wet, sometimes boggy and often support lush alpine meadows, whilst those made of limestone are usually dry and covered in talus or gravel.
A trough is an elongated area of lower air pressure. Since pressure is closely linked to wind, there are often changes in wind direction across a trough. If a trough forms in the mid-latitudes, a temperature difference at some distance between the two sides of the trough usually exists and the trough might become a weather front at some