Homework Help: Geology

Posted by Hi on Thursday, February 21, 2013 at 12:13am.

How were divisions of time separated when scientists created the geologic time scale?

by the thickness of rock strata

by the color of rock strata

by the fossils found in rock strata

by the location of rock strata

Geology - JJ, Thursday, February 21, 2013 at 9:16am
I think it is by the fossils found in rock strata.

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