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8 entries under period topic. ×

3
Eocene genus extinction(expression, extinction, geochronology)
3
Lutetian extinction(expression, extinction, geochronology)
3
Priabonian extinction(expression, extinction, geochronology)
3
Ypresian extinction(expression, extinction, geochronology)
2
cretaceous-paleogene boundary(expression, extinction, geochronology)
2
paleocene extinction(expression, extinction, geochronology)
2
paleogene extinction(expression, extinction, geochronology)
2
paleogene genus extinction(expression, extinction, geochronology)
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APASmart Define. (1970). bartonian extinction thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/bartonian_extinction/thesaurus/related
ChicagoSmart Define. 1970. "bartonian extinction thesaurus" https://smartdefine.org/bartonian_extinction/thesaurus/related (accessed September 30, 2026).
HarvardSmart Define 1970, bartonian extinction thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/bartonian_extinction/thesaurus/related>.
MLASmart Define. "bartonian extinction thesaurus" 1 January 1970. Web. 30 September 2026. <https://smartdefine.org/bartonian_extinction/thesaurus/related>