Fossils from the ____ Would Be the Oldest in the Grand

Question

Fossils from the ____ would be the oldest in the Grand Canyon.  
A) hermit shale
B) redwall limestone
C) temple butte formation
D) bright angel shale
E) vishnu basement rocks

Accepted Answer

The Vishnu Basement rocks are the oldest rock unit in the Grand Canyon, estimated to be up to 1.84 billion years old. Therefore, any fossils found in this unit would be the oldest in the Grand Canyon.