This photograph shows light-colored granite and darker diorite (both igneous rocks).Which of the following statements is true?
A)the light-colored unit is younger because granite is more continental than diorite
B)the diorite is older because its weathered surfaces are darker
C)the granite is younger because it crosscuts the diorite
D)all of these

Question

This photograph shows light-colored granite and darker diorite (both igneous rocks).Which of the following statements is true? 
A)the light-colored unit is younger because granite is more continental than diorite 
B)the diorite is older because its weathered surfaces are darker 
C)the granite is younger because it crosscuts the diorite 
D)all of these

Quizplus · Accepted Answer

The granite is younger because it crosscuts the diorite, indicating that it was intruded after the formation of the diorite. The color or composition of the rocks does not necessarily indicate their age.

This Photograph Shows Light-Colored Granite and Darker Diorite (Both Igneous