【しじゅんかせき】

    noun (common) (futsuumeishi)
  1. index fossil; zone fossil; guide fossil; indicator fossilgeology and paleontology
Forms
  • 【しじゅんかせき】
  • しじゅんかせき
Generated definitions (experimental)
  1. index fossil; zone fossil; guide fossil; indicator fossil
    2. This term refers to fossils used by paleontologists to define and identify particular time periods in the geological time scale. They are distinctive, abundant, and short-lived species that help in correlating the ages of rock layers.
    Ammonites are very important as index fossils of the Mesozoic era.
    Index fossils allow for the comparison of rock layers from different regions.
Generated collocations (experimental)
to use index fossilsstudy of index fossilsexamples of index fossilsrole of index fossilsidentification of index fossilsdistribution of index fossilsto utilize fossils as index fossilsせい性importance of index fossilsthe strata indicated by index fossilsindex fossils and relative dating
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