Question

Which of the following mountain ranges is made of rock that is believed to be over four million years old? A. the Laurentian Mountains B. the St. Elias Mountains C. the Rocky Mountains D. the Cascade Mountains

Answer 1

Answer: A. the Laurentian Mountains

Explanation: Just took the test on 2020e.

Answer 2

The laurentian mountains are assumed to be 550 million years old