What is Trough (geology)?
[[File:Death Valley,19820817,Dante's View,Salt shoreline.jpg|thumb|220px|[[Death Valley]], [[California]]]] [[File:NASA Radar 3-D View of San Andreas Fault.jpg|thumb|220px|Much of the [[San Andreas Fault]] is lined by a trough. This false-colour radar image shows a section of the fault west of [[San Francisco Bay]]]] [[File:Okinawa trough topographic.png|thumb|220px|[[Okinawa]] Trough, north of Ryukyu Islands]] [[File:Trough xbed mcr1.JPG|thumb|220px|Trough cross-bedding in the Waddens Cove Formation (Pennsylvanian), Sydney Basin, [[Nova Scotia]].]] In [[geology]], a '''trough''' refers to a linear [[Depression (geology)|depression]] that extends in one direction over a distance. It is less steep than a [[oceanic trench|trench]]. A trough can be a narrow [[Basin (geology)|basin]] or a geologic [[Rift (geology)|rift]]. There are various '''oceanic troughs''', troughs found under [[ocean]]s; examples include the rifts along the [[mid-ocean ridge]]s. [[Category:Landforms]] {{geo-stub}}