In geology, a trough generally refers to a linear structural depression that extends laterally over a distance, while being less steep than a trench. Structural geology is the study of the three dimensional distribution of rock bodies and their planar or folded surfaces and their internal fabrics The oceanic trenches are hemispheric-scale long but narrow topographic depressions of the sea floor A trough can be a narrow basin or a geologic rift. A structural basin is a large-scale structural formation of rock strata formed by tectonic warping of previously flat lying strata. In Geology, a rift is a place where the Earth 's crust and Lithosphere are being pulled apart and is an example of Extensional tectonics There are various oceanic troughs, troughs found under oceans; examples include the rift along the mid-oceanic ridge and the Cayman Trough. An ocean (from Greek, ''Okeanos'' (Oceanus) is a major body of saline water, and a principal component of the Hydrosphere. A mid-ocean ridge or mid-oceanic ridge is an underwater Mountain range typically having a valley known as a Rift running along its axis formed by The Cayman Trough, or Cayman Trench, also called Bartlett Deep, or Bartlett Trough, is a complex Transform fault zone which contains a small
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