What kind of coarse grained plutonic rock would you expect to find in the ocean crust underneath an undersea basaltic volcano?
A)granite
B)peridotite
C)diorite
D)gabbro

Question

Quizplus · Accepted Answer

Gabbro is a common coarse-grained plutonic rock found in the ocean crust. It is formed from the slow cooling and solidification of magma below the Earth's surface and is a common constituent of the oceanic crust. Underneath an undersea basaltic volcano, one would expect to find gabbro because basaltic lava is also a common product of magma solidification in the oceanic crust.

What Kind of Coarse Grained Plutonic Rock Would You Expect