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How do index fossils help scientists?

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Answer:

Step-by-step explanation:

An index fossil allows a scientist to determine the age of the rock it is in. ... Different species of trilobite fossils can be used to narrow the age even more.

User Alexander Savin
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Answer:

They aid in comparison of rock layers at distant locations.

Step-by-step explanation:

I took the test

User Aradhna
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