Answered

A layer of rock contains an index fossil that is 250 million years old. How old is another layer of rock with the same fossil 1,000 miles away?

A. 200 million years
B. 250 million years
C. 100 million years
D. 350 million years

Answer :

BMERKELISGO
It is B, It is also 250 million years old because an index fossil tells us a time period

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