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5 entries under geochronology topic. ×

2
Eocene extinction(expression, geohistory, extinction)
2
Oligocene extinction(expression, geohistory, extinction)
2
Paleocene extinction(expression, geohistory, extinction)
2
Paleogene genus extinction(expression, geohistory, extinction)
2
Paleogene species extinction(expression, geohistory, extinction)
For more, visit Paleogene_extinction on Power Thesaurus
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APASmart Define. (1970). paleogene extinction thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/paleogene_extinction/thesaurus/narrower
ChicagoSmart Define. 1970. "paleogene extinction thesaurus" https://smartdefine.org/paleogene_extinction/thesaurus/narrower (accessed October 1, 2026).
HarvardSmart Define 1970, paleogene extinction thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/paleogene_extinction/thesaurus/narrower>.
MLASmart Define. "paleogene extinction thesaurus" 1 January 1970. Web. 1 October 2026. <https://smartdefine.org/paleogene_extinction/thesaurus/narrower>