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30 entries under expression topic. ×

10
Oligocene extinction(extinction, period, geochronology)
10
cretaceous-paleogene boundary(geohistory, extinction, period, boundary)
7
Cretaceous-Paleogene extinction event(geohistory, event, extinction, paleogene)
7
Paleocene extinction(extinction, period, geochronology)
5
Paleogene genus extinction(extinction, period, paleogene)
4
Paleogene species extinction(extinction, period, paleogene)
3
Luvaris necopinatus(fauna, extinction, ypresian)
3
Oligocene genus extinction(extinction, period, geochronology)
3
Paleocene genus extinction(extinction, period, geochronology)
2
Alvarez hypothesis(geology, geohistory, hypothesis)
2
Boltysh crater(geology, crater, paleogene)
2
Chattian extinction(extinction, period, geochronology)
2
Chicxulub crater(geology, crater, paleogene)
2
Chota Formation(geohistory, formation, paleogene)
2
Denver Formation(geohistory, formation, paleogene)
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)
2
Hell Creek Formation(geohistory, formation, paleogene)
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For more, visit Eocene_extinction on Power Thesaurus
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APASmart Define. (1970). eocene extinction thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/eocene_extinction/thesaurus/related
ChicagoSmart Define. 1970. "eocene extinction thesaurus" https://smartdefine.org/eocene_extinction/thesaurus/related (accessed September 27, 2026).
HarvardSmart Define 1970, eocene extinction thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/eocene_extinction/thesaurus/related>.
MLASmart Define. "eocene extinction thesaurus" 1 January 1970. Web. 27 September 2026. <https://smartdefine.org/eocene_extinction/thesaurus/related>