The Mariana Trench or Marianas Trench is the deepest pairt o the warld's oceans. It is locatit in the wastren Paceefic Ocean, tae the east o the Mariana Islands. The trench is aboot 2,550 kilometres (1,580 mi) lang but haes an average width o anly 69 kilometres (43 mi). It reaches a maximum-kent depth o 10,994 m (± 40 m) or 6.831 mi (36,070 ± 131 ft) at the Challenger Deep, a smaw slot-shaped valley in its fluir, at its soothren end, althou some unrepeatit measurements place the deepest portion at 11.03 kilometres (6.85 mi).
- Variant accordin tae the U.S. National Geospatial-Intelligence Agency
- "Scientists map Mariana Trench, deepest known section of ocean in the world". The Telegraph. Telegraph Media Group. 7 December 2011. Retrieved 23 March 2012.
- "Mariana Trench". Encyclopædia Britannica. Encyclopædia Britannica.