GEOLOGY

Detailed explanation-1: -Subduction occurs when two tectonic plates meet and one moves underneath the other (Fig.

Detailed explanation-2: -When tectonic plates converge, one plate slides beneath the other plate, or subducts, descending into the Earth’s mantle at rates of 2-8 centimeters (1–3 inches) per year.

Detailed explanation-3: -This process, called “subduction, ” involves an older, denser tectonic plate being forced deep into the planet underneath a younger, less-dense tectonic plate. When this process occurs in the ocean, an trench">ocean trench can form.

Detailed explanation-4: -Such destruction (recycling) of crust takes place along convergent boundaries where plates are moving toward each other, and sometimes one plate sinks (is subducted) under another. The location where sinking of a plate occurs is called a subduction zone.

Detailed explanation-5: -Convergent Boundaries At an ocean-ocean convergent boundary, one of the plates (oceanic crust and lithospheric mantle) is pushed, or subducted, under the other. Often it is the older and colder plate that is denser and subducts beneath the younger and hotter plate. There is commonly an ocean trench along the boundary.