WebOceanic lithosphere moves into trenches at a global rate of about 3 km 2 (1.2 sq mi) per year. [1] A trench marks the position at which the flexed, subducting slab begins to descend beneath another lithospheric slab. … WebA trench is a long, deep depression in the ocean floor. A trough is a gently sloping depression in the ocean floor. An island is a body of land surrounded by water. A ridge is long, narrow elevation of earth. A gap is a steep-sided opening through a mountain ridge. A seamount is an underwater mountain.

Undersea Geology National Geographic Society

WebMar 14, 2012 · See answer (1) Best Answer. Copy. trenches form at a subduction zone. When a oceanic crust and a continental crust collied the less dense oceanic crust sinks under and creates a trench. Wiki User. WebOcean trenches form where a plate with a leading edge of oceanic lithosphere collides with another plate. In these situations, an oceanic plate normally subducts into the mantle, forming a topographic low on the … mini bikes off road address

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WebIn that one cruise, Argo nearly equaled the amount of imagery taken on all the mid-ocean ridge systems worldwide in the previous decade. The second major step was the testing of the prototype Jason vehicle, a much smaller remotely operated vehicle named Jason Jr., and development of a fiber optic handling system for use in the deep sea. WebApr 5, 2024 · Fish living closer to the ocean surface have a swim bladder, a gas-filled organ which allows them to remain buoyant without sinking or floating to the top. Deep-sea fish … WebDec 5, 2024 · Ocean trenches exist in all the world's oceans. They include the Philippine Trench, Tonga Trench, the South Sandwich Trench, the Eurasian Basin and Malloy Deep, the Diamantina Trench, the Puerto Rican Trench, and the Mariana. Most (but not all) are directly related to subduction actions or plates moving apart, which take millions of years to occur. mini bikes of houston