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index fossil

/ˈɪndɛks ˈfɑsəl/ /ˈɪndɛks ˈfɒsəl/
noun
GeneralAcademicGeology
  1. 1 kılavuz fosil, indeks fosil countable

Definition (English)

A fossil from a species that existed briefly and widely, used to determine the age of rock layers.

Example Sentences

  1. The index fossil dated the layer to the late Cretaceous within a few million years.
    Kılavuz fosil, katmanı birkaç milyon yıllık bir hassasiyetle geç Kretase'ye tarihlendirdi.
  2. A good index fossil is short-lived in time but easy to recognise.
    İyi bir kılavuz fosil, jeolojik zamanda kısa ömürlüdür ama kolay tanınır.

Phrases 26

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