Magma has intruded into a limestone and a marble rind formed surrounding the granite pluton.The marble rind must be younger than the limestone according to the principle of
A) superposition.
B) baked contacts.
C) original horizontality.
D) lateral continuity.

Question

Quizplus · Accepted Answer

The process of baking a rock by the introduction of an igneous intrusion is called contact metamorphism. In this process, the surrounding rock is altered by the heat and pressure from the intrusion. The formation of a marble rind around the granite pluton indicates that the limestone was in contact with the hot magma, causing it to recrystallize into marble. This means that the marble rind is younger than the limestone it formed from, making option B, baked contacts, the correct principle.

Magma Has Intruded into a Limestone and a Marble Rind