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The Mariana Trench is an oceanic trench located in the western Pacific Ocean, about 200 kilometres (124 mi) east of the Mariana Islands; it is the deepest oceanic trench on Earth. It is crescent-shaped and measures about 2,550 km (1,580 mi) in length and 69 km (43 mi) in width. The maximum known depth is 10,984 ± 25 metres (36,037 ± 82 ft ...
The deep sea is broadly defined as the ocean depth where light begins to fade, at an approximate depth of 200 m (660 ft) or the point of transition from continental shelves to continental slopes. [1][2] Conditions within the deep sea are a combination of low temperatures, darkness, and high pressure. [3] The deep sea is considered the least ...
A single 50-fathom (300 ft; 91 m) skein of this rope was referred to as a line. ... This is the origin of the phrase "to deep six" as meaning to discard, or dispose of.
Geothermal gradient is the rate of change in temperature with respect to increasing depth in Earth 's interior. As a general rule, the crust temperature rises with depth due to the heat flow from the much hotter mantle; away from tectonic plate boundaries, temperature rises in about 25–30 °C/km (72–87 °F/mi) of depth near the surface in ...
The length of 50 metres (164 ft) must be between the touch pads at the end of each lane, if they are used. [3] If starting blocks are used, then there must be a minimum depth of 1.35 metres (4.4 ft) from between 1 metre (3 ft 3 in) from the end of the pool to at least 6 metres (19 ft 8 in) from the end of the pool.
The bow hit the bottom at a speed of about 20 knots (10 metres per second), digging about 60 feet (20 m) deep into the mud, up to the base of the anchors. The impact bent the hull in two places and caused it to buckle downwards by about 10° under the forward well deck cranes and by about 4° under the forward expansion joint .
It is the lowest freshwater lake on Earth and the second-lowest lake in the world (after the Dead Sea, a salt lake), [3] at levels between 215 and 209 metres (705 and 686 ft) below sea level. [4] It is approximately 53 km (33 mi) in circumference, about 21 km (13 mi) long, and 13 km (8.1 mi) wide.
The Wadi Mujib valley, 420 m below the sea level in the southern part of the Jordan valley, is a biosphere reserve, with an area of 212 km 2 (82 sq mi). [21] Rainfall is scarcely 100 mm (4 in) per year in the northern part of the Dead Sea and barely 50 mm (2 in) in the southern part. [22]