saharambrewin saharambrewin

15-11-2017
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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

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Yosoychrist Yosoychrist

12-03-2019

The laurentian mountains are assumed to be 550 million years old

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cardphan1 cardphan1

19-05-2020

Answer: A. the Laurentian Mountains

Explanation: Just took the test on 2020e.

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