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

Question

Quizplus · Accepted Answer

The Vishnu Basement Rocks are the oldest known rock units found in the Grand Canyon, dating back 1.84-1.68 billion years. They consist of metamorphic and igneous rocks that were originally deposited as sediments but were later deformed and altered by tectonic activity.

Fossils from Which Would Be the Oldest from the Grand