index 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
Syn: ↑guide fossil
Hypernyms: ↑fossil

Useful english dictionary. 2012.

Look at other dictionaries:

  • Index fossil — Index fossils (also known as guide fossils or zone fossils) are fossils used to define and identify geologic periods (or faunal stages). They work on the premise that, although different sediments may look different depending on the conditions… …   Wikipedia

  • index fossil — n. any fossil of wide geographical distribution and a short range in time, used to correlate and date rock strata and their associated fossils …   English World dictionary

  • index fossil — Geol., Paleontol. a widely distributed fossil, of narrow range in time, regarded as characteristic of a given geological formation, used esp. in determining the age of related formations. Also called guide fossil. [1895 1900] * * *       any… …   Universalium

  • index fossil — noun Date: 1900 a fossil usually with a narrow time range and wide spatial distribution that is used in the identification of related geologic formations …   New Collegiate Dictionary

  • index fossil — in′dex fos sil n. gel pal a widely distributed fossil, of narrow range in time, regarded as characteristic of a given geological formation and used esp. in determining the age of related formations • Etymology: 1895–1900 …   From formal English to slang

  • 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 …   Wiktionary

  • fossil — fossillike, adj. /fos euhl/, n. 1. any remains, impression, or trace of a living thing of a former geologic age, as a skeleton, footprint, etc. 2. a markedly outdated or old fashioned person or thing. 3. a linguistic form that is archaic except… …   Universalium

  • Fossil Fighters — North American front cover of Fossil Fighters. Developer(s) Nintendo SPD Red Entertainment M2 …   Wikipedia

  • Fossil group — Fossil Galaxy Groups, fossil Groups, or fossil clusters are believed to be the end result of galaxy merging within a normal galaxy group, leaving behind the X ray halo. Galaxies within a group interact and merge. The physical process behind this… …   Wikipedia

  • fossil — index prime (original) Burton s Legal Thesaurus. William C. Burton. 2006 …   Law dictionary

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