What is the meaning of 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.
WordNet 3.0 © 2006 by Princeton University
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APAWordNet. (2010). index fossil. Retrieved September 22, 2026, from http://smartdefine.org/index_fossil/definitions/1226986
ChicagoWordNet. 2010. "index fossil" http://smartdefine.org/index_fossil/definitions/1226986 (accessed September 22, 2026).
HarvardWordNet 2010, index fossil, Smart Define, viewed 22 September, 2026, <http://smartdefine.org/index_fossil/definitions/1226986>.
MLAWordNet. "index fossil" 23 October 2010. Web. 22 September 2026. <http://smartdefine.org/index_fossil/definitions/1226986>