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daser333 [38]
3 years ago
12

What are index fossils and how can they be used to help find the relative age of the rock layers?

Biology
1 answer:
bagirrra123 [75]3 years ago
8 0

Answer:

Certain fossils, called index fossils, help geologists match rock layers. To be useful as an index fossil, a fossil must be widely distributed and represent a type of organism that existed for a brief time period.

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