Magma has intruded into some 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) original continuity.

Question

Quizplus · Accepted Answer

The principle of baked contacts states that an igneous intrusion (magma) that comes in contact with existing rock will bake and alter the surrounding rock. In this case, the limestone was intruded by magma, forming a granite pluton, and the surrounding limestone was altered and turned into marble. This means that the marble rind must be younger than the limestone because it was formed as a result of the intrusion by the magma. Therefore, the best choice is B - baked contacts.

Magma Has Intruded into Some Limestone,and a Marble Rind Formed