Mariana Trench - the deepest place in the ocean

Mariana Trench is the deepest known oceanic trench. It reaches a maximum depth of about 6, 8 miles and it is the deepest place on the surface of the Earth. It is located in western part of North Pacific, east of Marion Island, near the island of Guam.

Trench represents a boundary between two tectonic plates, the Pacific and Philippine. The first one fell under the second one. The bottom of the trench is furher below sea level than Mount Everest is above it. At the bottom the pressure reaches 108.6 Mega Pascals, which is over a thousand times greater than the pressure at sea level.

The trench was first discovered in 1951 by the ship Challenger. The ship belongs to the British Navy and they called their discovery the Challenger’s trench. By using echo, it measured the depth of the trench at 35 761 feet at 11 ° 19'N, 142 ° 15'E coordinates.

In 1957, SOVIET Union ship reported a depth of 36200 feet and called it the Marian cave. (This was claimed by the Soviet Union, although no one repeated the research in this area with modern equipment).

In 1962, the ship M.V. Spencer F. Beird recorded a depth of 35810 feet using precision gauges as a measurement tool.

In 1984, Japan sent a highly specialized ship Takuji to research the trench. It used a narrow, high-frequency echo sounder and it the recorded a depth of 35,839 feet.

In January 1960, The U.S. Navy sent a bathyscaphe called Trist to the bottom of the trench and it reached it on 23rd January at 1:06 in the afternoon. Bathyscaphe recorded a depth of 37,798 feet, but this was later corrected to 35,813.

Most accurate measurement was committed by the Japanese Kaiki probe, which descended to the bottom on 24th March 1995 and recorded a depth of 35,797 feet.



Thanks For the Source : http://www.youkidding.me/2012/01/mariana-trench-deepest-place-in-ocean.html

Posted in: Amazing