title: Trough (geology)
text: # Trough (geology)
  
  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.
  
  There are various oceanic troughs on the ocean floors.
  
  ## Examples of oceanic troughs
  
  * Benue Trough
  * Cayman Trough
  * Hesperides Trough
  * Kings Trough
  * Mariana Trough
  * Nankai Trough
  * Northumberland Trough
  * Okinawa Trough in the East China Sea
  * Rockall Trough and others along the rift of the mid-oceanic ridge
  * Salton Trough
  * South Shetland Trough
  * Suakin Trough in the Red Sea
  * Timor Trough
  