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32 entries under expression topic. ×

11
cretaceous-paleogene boundary(geohistory, extinction, period, boundary)
10
eocene extinction(extinction, period, geochronology)
6
Paleocene extinction(extinction, period, geochronology)
6
Paleogene genus extinction(extinction, period, paleogene)
5
Cretaceous-Paleogene extinction event(geohistory, event, extinction)
5
Paleogene species extinction(extinction, period, paleogene)
3
Paleocene genus extinction(extinction, period, geochronology)
2
Acer dettermani(fauna, extinction, rupelian)
2
Acer ivanofense(fauna, extinction, rupelian)
2
Anthidium exhumatum(fauna, extinction, rupelian)
2
Anthidium scudderi(fauna, extinction, rupelian)
2
Boltysh crater(geology, crater, paleogene)
2
Chicxulub crater(geology, crater, paleogene)
2
Chota Formation(geohistory, formation, paleogene)
2
Denver Formation(geohistory, formation, paleogene)
2
Dolichoderus vectensis(fauna, extinction, rupelian)
2
Eocene genus extinction(extinction, period, geochronology)
2
Ferris Formation(geohistory, formation, paleogene)
2
Fort Union Formation(geohistory, formation, paleogene)
2
Guaduas Formation(geohistory, formation, paleogene)
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For more, visit Oligocene_extinction on Power Thesaurus
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APASmart Define. (1970). oligocene extinction thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/oligocene_extinction/thesaurus/related
ChicagoSmart Define. 1970. "oligocene extinction thesaurus" https://smartdefine.org/oligocene_extinction/thesaurus/related (accessed September 29, 2026).
HarvardSmart Define 1970, oligocene extinction thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/oligocene_extinction/thesaurus/related>.
MLASmart Define. "oligocene extinction thesaurus" 1 January 1970. Web. 29 September 2026. <https://smartdefine.org/oligocene_extinction/thesaurus/related>