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They are formed at destructive plate boundaries where one plates subducts under another. The deep sea trench marks the point at which the denser plate ( or faster plate when it is oceanic vs. oceanic) begins to subduct the lighter one. They are very long, narrow and steep-sided depressions in the ocean floor.
Wiki User
∙ 14y ago
Wiki User
∙ 14y agoThis is what I found on the internet:
Thermal shock from cold ocean water is proposed as forming ocean trenches by cracking and then cooling the crust to great depth. The Benioff zone results when material from great depth moves up toward this less dense region made less dense by incorporation of large amounts of water into the rocks down almost to the former atmosphere.
The oceanic trenches are hemispheric-scale long but narrow topographic depressions of the sea floor. They are also the deepest parts of the ocean floor.
Wiki User
∙ 12y agoDeep-ocean trenches are formed where seafloor tectonic plates subduct under continental plates.
Wiki User
∙ 13y agoWhen one plate, usually the denser one, is pushed underneath the other, less dense plate. This is called plate subduction.
Wiki User
∙ 11y agoThe trench is formed when one plate is subducted under the other plate cuasing a trench
Wiki User
∙ 8y agosubduction of an oceanic plate under a continental plate.
Wiki User
∙ 11y agoat subduction zones
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How and why does an oceanic trench form?
The earth has plates and when the earth shirfts its plates it open a trench canyon like structure. sorry if my grammer is not perfect. An oceanic trench forms when a denser plate is subducted into the Earth at a convergent plate margin. Because the denser plate (always oceanic crust) is being bent and pulled down into the mantle, a trench forms at this subduction zone.
Which features form when two oceanic plates diverge?
Oceanic Ridges, when the plates separate magma leaks out through the surface and creates a small ridge or mountain. Repetition of this causes the ridge to get larger and larger as time progresses.
What causes oceanic trenches?
Deep ocean trenches are made where one plate is submerged under another
Convergent boundaries can be divided into 3 categories what are these categories and what geological feature are created by each?
The categories are a continental and a continental plate colliding, continental and oceanic plates colliding, and oceanic and oceanic plates colliding. The two continental plates form mountains. The continental and oceanic plated colliding cause subduction zones and volcanoes. Oceanic and oceanic plates colliding form a trench.
What is form when oceanic crust is pushed under continental crust?
Trenches. An example would be the deepest point of the ocean in the world, which is a trench in Japan.
What causes an ocean trench form?
subduction of an oceanic plate under a continental plate.
What form when a oceanic plate collides with oceanic plate?
a trench will form
Are Russia and Japan connected with an oceanic ridge or an oceanic trench?
Trench
What is the oceanic trench?
the answer i Izu the trench
What is an example of convergent boundary oceanic-oceanic?
an oceanic trench
What is an example of a oceanic oceanic convergent boundary?
an oceanic trench
How does a deep-ocean trench form?
They form when the oceanic crust goes under the Continental crust. The oceanic crust then forms the trenches through a process called subduction.
What are produced at oceanic-oceanic convergent boundaries?
trench
How and why does an oceanic trench form?
The earth has plates and when the earth shirfts its plates it open a trench canyon like structure. sorry if my grammer is not perfect. An oceanic trench forms when a denser plate is subducted into the Earth at a convergent plate margin. Because the denser plate (always oceanic crust) is being bent and pulled down into the mantle, a trench forms at this subduction zone.
Plate with oceanic crust sinking under another plate with oceanic crust?
When two oceanic plates or two plates both containing oceanic crust collide or converge, the convergent boundary will form a trench. The plate which has the higher density will plunge beneath the other plate forming a trench.
What is the name given to the valleys that form underwater where subduction is taking place?
This is known as an oceanic trench.
How does a trench forms?
They form when the oceanic crust goes under the Continental crust. The oceanic crust then forms the trenches through a process called subduction.
