What does index fossil mean?

Definitions for index fossil
in·dex fos·sil

Here are all the possible meanings and translations of the word index fossil.

Princeton's WordNet

  1. index fossil, guide fossil(noun)

    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

Wiktionary

  1. index fossil(Noun)

    Any ancient remains of a plant or animal that lived during a specific geological period and that can be used to date the containing rocks.

Freebase

  1. Index fossil

    Index fossils are fossils used to define and identify geologic periods. They work on the premise that, although different sediments may look different depending on the conditions under which they were laid down, they may include the remains of the same species of fossil. If the species concerned were short-lived, then it is certain that the sediments in question were deposited within that narrow time period. The shorter the lifespan of a species, the more precisely different sediments can be correlated, and so rapidly evolving types of fossils are particularly valuable. The best index fossils are common, easy-to-identify at species level, and have a broad distribution—otherwise the likelihood of finding and recognizing one in the two sediments is minor. Ammonites fit these demands well, and are the best-known fossils that have been widely used for this. Other important groups that provide index fossils are the corals, graptolites, brachiopods, trilobites, and echinoids. Conodonts may be identified by experts using light microscopy such that they can be used to index a given sample with good resolution. Fossilized teeth of mammals have also been used.

How to pronounce index fossil?

  1. Alex
    Alex
    US English
    Daniel
    Daniel
    British
    Karen
    Karen
    Australian
    Veena
    Veena
    Indian

How to say index fossil in sign language?

  1. indexfossil

Numerology

  1. Chaldean Numerology

    The numerical value of index fossil in Chaldean Numerology is: 9

  2. Pythagorean Numerology

    The numerical value of index fossil in Pythagorean Numerology is: 1

Images & Illustrations of index fossil

  1. index fossilindex fossilindex fossilindex fossilindex fossil


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"index fossil." Definitions.net. STANDS4 LLC, 2019. Web. 21 Jul 2019. <https://www.definitions.net/definition/index+fossil>.

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