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7 entries under period topic. ×

2
danian first appearance(expression, geohistory, appearance, paleocene)
2
Extant Paleocene first appearance(expression, geohistory, appearance, paleocene)
2
Selandian first appearance(expression, geohistory, appearance, paleocene)
2
eocene first appearance(expression, geohistory, paleocene)
2
extant paleogene first appearance(expression, geohistory, paleocene)
2
oligocene first appearance(expression, geohistory, paleocene)
2
paleogene first appearance(expression, appearance, paleocene)
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APASmart Define. (1970). thanetian first appearance thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/thanetian_first_appearance/thesaurus/related
ChicagoSmart Define. 1970. "thanetian first appearance thesaurus" https://smartdefine.org/thanetian_first_appearance/thesaurus/related (accessed October 1, 2026).
HarvardSmart Define 1970, thanetian first appearance thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/thanetian_first_appearance/thesaurus/related>.
MLASmart Define. "thanetian first appearance thesaurus" 1 January 1970. Web. 1 October 2026. <https://smartdefine.org/thanetian_first_appearance/thesaurus/related>