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The Mariana Trench or Marianas Trench is the deepest known part of the world's oceans. It is located in the western Pacific Ocean, to the east of the Mariana Islands. The trench is about 2,550 kilometres (1,580 mi) long but has an average width of only 69 kilometres (43 mi). It reaches a maximum-known depth of 10,994 m (± 40 m) or 6.831 mi (36,070 ± 131 ft) at the Challenger Deep, a small slot-shaped valley in its floor, at its southern end,although some unrepeated measurements place the deepest portion at 11.03 kilometres (6.85 mi).

We can see the great difference between the Mariana Trench holes and the well-known russian Kola Superdeep Borehole

The Kola Superdeep Borehole (Russian: Кольская сверхглубокая скважина, Kolskaya sverkhglubokaya skvazhina) is the result of a scientific drilling project of the Soviet Union in the Pechengsky District, on the Kola Peninsula. The project attempted to drill as deep as possible into the Earth's crust. Drilling began on 24 May 1970 using the Uralmash-4E, and later the Uralmash-15000 series drilling rig. A number of boreholes were drilled by branching from a central hole. The deepest, SG-3, reached 12,262 metres (40,230 ft) in 1989 and still is the deepest artificial point on Earth.

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Date/TimeThumbnailDimensionsUserComment
current01:32, November 27, 2016Thumbnail for version as of 01:32, November 27, 2016480 × 269 (36 KB)Chiltern Hills1 (Talk | contribs)created video
01:08, November 21, 2016Thumbnail for version as of 01:08, November 21, 2016480 × 269 (36 KB)Chiltern Hills1 (Talk | contribs)created video
05:11, November 20, 2016Thumbnail for version as of 05:11, November 20, 2016480 × 269 (36 KB)Chiltern Hills1 (Talk | contribs)created video
09:48, November 16, 2016Thumbnail for version as of 09:48, November 16, 2016480 × 269 (36 KB)Chiltern Hills1 (Talk | contribs)created video
01:46, April 15, 2015Thumbnail for version as of 01:46, April 15, 2015480 × 269 (36 KB)The River Nile-2 (Talk | contribs)created video

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