Question

1. what is the grand canyons middle grouping of rocks called?

○ supergroup rocks
○ layered paleozoic rocks
○ sedimentary rocks
○ vishnu basement rocks

Explanation:

The Grand Canyon’s rock layers are divided into three main groups: the oldest Vishnu basement rocks (bottom), the middle layered Paleozoic rocks, and the youngest supergroup rocks (top). Sedimentary rocks are a general type, not the specific middle grouping.

Answer:

B. layered Paleozoic rocks