index fossil definition

  • noun:
    • The fossil remains of an organism that lived-in a certain geologic age, regularly recognize or date the stone or rock level for which it really is discovered. Also referred to as guide fossil.
    • Any ancient stays of a plant or animal that lived during a certain geological period and that can be used to time the containing stones.
    • a fossil proven to have lived in a particular geologic age you can use currently the stone level for which its found

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