From this cross section of the Grand Canyon,what are the oldest rocks or structures?
A)Late Cenozoic basalts
B)Mesozoic sedimentary rocks
C)Precambrian sedimentary and igneous rocks
D)Precambrian metamorphic rocks and granite
E)Hurricane fault and faults along the Grand Wash Cliffs

Question

From this cross section of the Grand Canyon,what are the oldest rocks or structures? 
A)Late Cenozoic basalts 
B)Mesozoic sedimentary rocks 
C)Precambrian sedimentary and igneous rocks 
D)Precambrian metamorphic rocks and granite 
E)Hurricane fault and faults along the Grand Wash Cliffs

Quizplus · Accepted Answer

The oldest rocks or structures in the Grand Canyon are the Precambrian metamorphic rocks and granite, which are found in the inner gorge.

From This Cross Section of the Grand Canyon,what Are the Oldest