C. Romans.......................
Answer:
The top of the Grand Canyon is made up of Kaibab Limestone. Which contains marine fossils which indicate that it originated at the bottom of the sea.
Explanation:
A.
1 thousand years old
B.
500 million years old
C.
70 million years old
D.
5 billion years old
Russia
United States
Turkey
b. bedrock.
c. aggregate.
d. pollen.