a deep valley found in the ocean?

Answer 1

Perhaps you are thinking of a trench, such as when one plate converges and subducts under a land mass.

Answer 2

The proper name for a deep valley found in the ocean is an abyss. There two well known and named abysses, the Marianas Trench (7+ miles deep) located near Guam in the Pacific and the "Tongue of the Ocean" (6+ miles deep) located near the Grand Banks Islands in the Atlantic.

Answer 3

In geology, a rift valley is a valley created by the formation of a rift. The Great Rift Valley, located in the Middle East and Africa, is the most famous of the world's rift valleys. Rift valleys are produced by tensional tectonic forces which occur at divergent plate boundaries. Rift valleys typically appear as a downdropped graben between a pair of faults, or vertical Earth movements. Rift valleys are often associated with and flanked by volcanoes.

The most extensive rift valley is located along the crest of the mid-ocean ridge system and is the result of seafloor spreading. Existing continental rift valleys are usually the result of a failed arm (aulacogen) of a triple junction. Examples besides the Great Rift Valley include the Mississippi embayment and the Rio Grande Rift in North America.

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Retrieved from "http://en.wikipedia.org/wiki/Rift_valley"

Answer 4

The Mariana Trench is located in the Pacific Ocean, just east of the 14 Mariana Islands near Japan.
it is the deepest part of the earth's oceans, and the deepest location of the earth itself. It was created by ocean-to-ocean subduction, a phenomena in which a plate topped by oceanic crust is subducted beneath another plate topped by oceanic crust.
The deepest part of the Mariana Trench is the Challenger Deep.

Answer 5

Marianas Trench

Answer 6

isnt that called a trench or rift valley.

Answer 7

abyss

Answer 8

a rift.