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5 votes
Which of the following come from types of organisms that lived during

only one short period of time and that are used to determine the
relative age of rocks?
a. imprints
b. index fossils
c. trace fossils
d. extrusions

User Chester
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1 Answer

6 votes
I think it's b. Or c. Sorry if it's wrong but I'm pretty sure it's one of those
User George Godik
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