How are deep ocean trenches formed quizlet?

Ocean trenches are deep sections of the ocean where an oceanic plate is usually sinking below a continental plate. They are formed in the subduction zone as the denser oceanic plate is subjected under the continental plate.

How are deep ocean trenches related to plate boundaries where do they occur What is the deepest location on Earth?

Notable oceanic trenches

Trench	Location
Ryukyu Trench	Eastern edge of Japan’s Ryukyu Islands
South Sandwich Trench	East of the South Sandwich Islands
Sunda Trench	Curves from south of Java to west of Sumatra and the Andaman and Nicobar Islands
Tonga Trench *	Near Tonga

How do trenches and ridges form?

Trench: very deep, elongated cavity bordering a continent or an island arc; it forms when one tectonic plate slides beneath another. Ridge: underwater mountain range that criss-crosses the oceans and is formed by rising magma in a zone where two plates are moving apart.

What tectonic setting is linked with ocean trenches quizlet?

Ocean trenches form where crustal plates plunge back into the mantle. Thus, these long, narrow depressions are associated with convergent plate boundaries.

What tectonic process formed the Mariana Trench?

subduction
The Mariana Trench was formed through a process called subduction. Earth’s crust is made up of comparably thin plates that “float” on the molten rock of the planet’s mantle. While floating on the mantle, the edges of these plates slowly bump into each other and sometimes even collide head-on.

What is formed at the trench trench?

Trenches are formed by subduction, a geophysical process in which two or more of Earth’s tectonic plates converge and the older, denser plate is pushed beneath the lighter plate and deep into the mantle, causing the seafloor and outermost crust (the lithosphere) to bend and form a steep, V-shaped depression.

What will be formed in ridge trench transform plate boundaries?

Deep trenches are features often formed where tectonic plates are being subducted and earthquakes are common. While the process of forming these mountain ranges is volcanic, volcanoes and earthquakes along oceanic spreading ridges are not as violent as they are at convergent plate boundaries.

What are ocean trenches and how are they formed?

Ocean trenches, by definition, are trenches in the ocean. There is, however, a specific type of trench called a deep ocean trench. These ocean trenches form by way of subduction. Subduction is the most common way deep ocean trenches form, but some trenches can be formed via plate separation.

What are deep ocean trenches associated with?

Deep-sea trenches generally lie seaward of and parallel to adjacent island arcs or mountain ranges of the continental margins. They are closely associated with and found in subduction zones—that is, locations where a lithospheric plate bearing oceanic crust slides down into the upper mantle under the force of gravity.

What is the deepest trench in the world?

With a depth of 36,201 feet, the Challenger Deep of the Mariana Trench is the deepest known oceanic trench in the world and is located in the Pacific Ocean .

What is an example of a deep ocean trench?

Examples of some deep ocean trenches that are subduction zones are off the West coast of South America, in the Peruvian Trench. The Aleutian Trench, in the North Pacific Ocean, and the deepest, most famous one in the world, the Marianas Trench off the coast of the Marianas Islands in the Southeast Pacific.