What is a fossil known to have lived in a particular geologic age that can be used to date the rock layer in which it is found? A. hypothesis B. index fossil C. jellyfish fossil D. hippopotamus fossil - Vocabulary | English Grammar Quiz

What is a fossil known to have lived in a particular geologic age that can be used to date the rock layer in which it is found?

A. hypothesis

B. index fossil

C. jellyfish fossil

D. hippopotamus fossil

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