list of index fossils

      List of index fossils GudangMovies21 Rebahinxxi LK21

      Index fossils (also known as guide fossils or indicator fossils) are fossils used to define and identify geologic periods (or faunal stages). Index fossils must have a short vertical range, wide geographic distribution and rapid evolutionary trends. Another term, "zone fossil", is used when the fossil has all the characters stated above except wide geographical distribution; thus, they correlate the surrounding rock to a biozone rather than a specific time period.


      See also


      Biostratigraphy#Index fossils


      References

    Kata Kunci Pencarian: list of index fossils

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