Long oceanic mountain chains typically are characterized by_____________ .
A) granitic plutons and batholiths
B) layers of igneous rocks
C) rocks older than 1 billion years old
D) highly deformed sedimentary rocks

Question

Quizplus · Accepted Answer

Long oceanic mountain chains, also known as mid-ocean ridges, are characterized by layers of igneous rocks. These rocks are formed by the solidification of magma that rises from the mantle and is extruded onto the ocean floor. As the magma solidifies, it forms new crustal material and pushes apart the existing plates, creating the mountain chain. The rocks found along mid-ocean ridges are generally younger than 200 million years old.

Long Oceanic Mountain Chains Typically Are Characterized By_____________