Trough (geology)
Linear structural depression that extends laterally over a distance / From Wikipedia, the free encyclopedia
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 tectonic plates.
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For troughs created by glaciation, see Glacial trough.
There are various oceanic troughs on the ocean floors.