index fossil


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index fossil

n.
The fossil remains of an organism that lived in a particular geologic age, used to identify or date the rock or rock layer in which it is found. Also called guide fossil.

index fossil

n
(Geological Science) a fossil species that characterizes and is used to delimit a geological zone. Also called: zone fossil

in′dex fos`sil


n.
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.
[1895–1900]

index fossil

- One useful for dating and demonstrating the relation between strata in which it is found.
See also related terms for useful.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.index fossil - a fossil known to have lived in a particular geologic age that can be used to date the rock layer in which it is foundindex fossil - 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
fossil - the remains (or an impression) of a plant or animal that existed in a past geological age and that has been excavated from the soil
References in periodicals archive ?
Every Era deserves its Index Fossil and no material remnant evokes those carefree days from 1890 until roughly WWI quite as convincingly as the small, hide-out handguns of the day.
This extends the geographic range of this Gulf Coast index fossil west from Mississippi to Texas.
Abstract: Hasso Spode, "Fordism, Mass Tourism and the Third Reich: The 'Strength through Joy' Seaside Resort as an Index Fossil"