Where are trenches formed at?

Where are trenches formed at?

In particular, ocean trenches are a feature of convergent plate boundaries, where two or more tectonic plates meet. At many convergent plate boundaries, dense lithosphere melts or slides beneath less-dense lithosphere in a process called subduction, creating a trench.

How are 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.

Where do deep ocean trenches occur quizlet?

Where does a Deep-Ocean Trench occur? A convergent plate boundary where one continental plate and one oceanic plate collide.

Where are trenches found on the seafloor?

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.

How were trenches formed?

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.

How are trenches and ridges formed?

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 is the definition for trench quizlet?

A block of barbed wire and wooden obstacles to stop any enemy soldier from advancing through the trench system. Trench Block. A break in the barbed wire to allow soldiers out into no man’s land. Wire break. An underground shelter.

What are rocks made of quizlet?

A rock is defined as a naturally occurring solid – composed of minerals, – matter,glass,smaller – fragments, or any combination of these.

What occurs at an ocean trench?

What are ocean trenches? Ocean trenches are steep depressions in the deepest parts of the ocean [where old ocean crust from one tectonic plate is pushed beneath another plate, raising mountains, causing earthquakes, and forming volcanoes on the seafloor and on land.

What formed the Mariana Trench?

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.