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.
What are deep ocean trenches quizlet?
Ocean trenches are deep sections of the ocean where an oceanic plate is usually sinking below a continental plate.
Where are deep ocean trenches found?
Trenches are found on the floor of the sea; however, their common name is deep ocean trenches because they are more often found in the deepest areas of the ocean. Trenches are formed in subduction zones where tectonic plates collide. There are many known trenches that scientists continue to study.
What type of plate boundary is associated with deep ocean trenches quizlet?
Deep sea trenches are the major topographic expression of convergent plate boundaries, surrounding most of the Pacific Rim.
Do deep ocean trenches form at divergent plate boundaries?
No, ocean trenches do not occur at divergent plate boundaries. They are formed at convergent boundaries.
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 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 are the characteristics of oceanic trenches quizlet?
At a converging plate boundary, the denser oceanic plate will undergo subduction at the subduction zone, resulting in a depression aka oceanic trench. The depression maybe formed by the convergence of Two oceanic plates, of which the denser plate go through subduction. You just studied 3 terms!
Which of the following ocean floor features is associated with trenches?
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 an example of a deep ocean trench?
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.
What is the deepest ocean trench?
The deepest part of the ocean is called the Challenger Deep and is located beneath the western Pacific Ocean in the southern end of the Mariana Trench, which runs several hundred kilometers southwest of the U.S. territorial island of Guam. Challenger Deep is approximately 10,935 meters (35,876 feet) deep.
How are deep ocean trenches related to plate boundaries quizlet?
How are deep-ocean trenches related to plate boundaries? Deep-ocean trenches are sites of plate convergence where an oceanic plate subducts under another plate.
What is a divergent boundary?
A divergent boundary occurs when two tectonic plates move away from each other. Along these boundaries, earthquakes are common and magma (molten rock) rises from the Earth’s mantle to the surface, solidifying to create new oceanic crust.
What is a convergent plate boundary?
A convergent plate boundary is a location where two tectonic plates are moving toward each other, often causing one plate to slide below the other (in a process known as subduction). The collision of tectonic plates can result in earthquakes, volcanoes, the formation of mountains, and other geological events.
Are trenches formed at transform boundaries?
What is formed in transform boundaries? Deep trenches are features often formed where tectonic plates are being subducted and earthquakes are common. … This is known as a transform plate boundary. As the plates rub against each other, huge stresses can cause portions of the rock to break, resulting in earthquakes.
What is ocean ocean convergent boundary?
At an ocean-ocean convergent boundary, one of the plates (oceanic crust and lithospheric mantle) is pushed, or subducted, under the other (Figure 4.6. 1). Often it is the older and colder plate that is denser and subducts beneath the younger and warmer plate.
