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9 August, 00:24

Volcanic rock has often been found early in the rock record by less frequently in later rock layers. What does this suggest to scientists about early earth?

A volcanic rock is easier to find

B volcanic rock is more easily preserved than other kinds of rock

C volcanic activity was more common in the past than it is today

D volcanic activity is the same today as it was early in earth's history

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  1. 9 August, 00:26
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    The answer is C "volcanic activity was more common in the past than it is today
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