Question

Subduction zones form when an oceanic plate collides with another oceanic plate or continental plate. The continental crust is lighter and less dense than oceanic crust. Continental crust's density is approximately 2.7 grams per cubic centimeter. Oceanic crust is thinner and the average density is about 3.3 cubic centimeters. When the two crustal plates converge the oceanic plate always bends and subducts beneath a continental plate. Once the oceanic crust subjects, the rocks are subjected to changes in heat and pressure. Because of this, we would expect to find ___________ rocks in the area of a subduction.

Answer 1

B

Step-by-step explanation:

Igneous rocks could form at points B or C. Intrusive means the rock formed inside of the Earth and that would be at point B

Answer 2

The answer is; metamorphic

Occurs when igneous and sedimentary rocks are subjected to extreme temperatures and pressure such that their chemical composition changes. Examples of metamorphic rocks are; marble (that metamorphoses from limestone rock), quartzite (from sandstone). Other types of metamorphic rock include gneiss and schist.