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23 entries under paleogene topic. ×

11
cretaceous-paleogene boundary(expression, geohistory, extinction, period, boundary)
6
Paleogene genus extinction(expression, extinction, period)
5
Paleogene species extinction(expression, extinction, period)
3
Madtsoia(noun, fauna, eocene, extinction)
2
Alamitophis(noun, fauna, extinction)
2
Boltysh crater(expression, geology, crater)
2
Chicxulub crater(expression, geology, crater)
2
Chota Formation(expression, geohistory, formation)
2
Denver Formation(expression, geohistory, formation)
2
Ferris Formation(expression, geohistory, formation)
2
Fort Union Formation(expression, geohistory, formation)
2
Guaduas Formation(expression, geohistory, formation)
2
Hell Creek Formation(expression, geohistory, formation)
2
Hyposaurus(noun, fauna, extinction)
2
Lopez de Bertodano Formation(expression, geohistory, formation)
2
Madtsoiidae(noun, fauna, extinction)
2
Ojo Alamo Formation(expression, geohistory, formation)
2
Palaeophiidae(noun, fauna, extinction)
2
Santa Lucia Formation(expression, geohistory, formation)
2
Shiva crater(expression, geology, crater)
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APASmart Define. (1970). oligocene extinction thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/oligocene_extinction/thesaurus/related
ChicagoSmart Define. 1970. "oligocene extinction thesaurus" https://smartdefine.org/oligocene_extinction/thesaurus/related (accessed October 1, 2026).
HarvardSmart Define 1970, oligocene extinction thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/oligocene_extinction/thesaurus/related>.
MLASmart Define. "oligocene extinction thesaurus" 1 January 1970. Web. 1 October 2026. <https://smartdefine.org/oligocene_extinction/thesaurus/related>