GEOLOGY

EARTH SCIENCE

TECTONICS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The place where old crust is pushed down into a trench is called what?
A
subduction
B
convection current
C
deep-ocean trench
D
None of the above
Explanation: 

Detailed explanation-1: -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-2: -Subduction is a significant geological process involving plate tectonics. The product of convergent boundaries, subduction involves the movement of an oceanic plate into the mantle where it meets a continental or another oceanic plate. The area where subduction occurs is called a subduction zone.

Detailed explanation-3: -How Ocean Trenches Form Subduction ZonesWhen the leading edge of a dense tectonic plate meets the leading edge of a less-dense plate, the denser plate bends downward. This place where the denser plate subducts is called a subduction zone.

Detailed explanation-4: -Where two tectonic plates converge, if one or both of the plates is oceanic lithosphere, a subduction zone will form. An oceanic plate will sink back into the mantle.

There is 1 question to complete.