The Mid-Oceanic Ridge is composed mainly of:
A) basalt.
B) ocean floor sediments.
C) folded and faulted sedimentary rocks.
D) granite.

Question

Quizplus · Accepted Answer

The Mid-Oceanic Ridge is largely made up of basalt, which is an igneous rock that is formed from cooled magma. As magma rises up from the mantle and solidifies, it forms new oceanic crust, which is added to the existing plates and causes the seafloor to spread apart. This process creates the characteristic ridge-like feature of the Mid-Oceanic Ridge.

The Mid-Oceanic Ridge Is Composed Mainly Of