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4 entries under appearance topic. ×

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Eocene first appearance(expression, geohistory, geochronology)
5
Extant Paleogene first appearance(expression, geohistory, geochronology)
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Oligocene first appearance(expression, geohistory, geochronology)
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Paleocene first appearance(expression, geohistory, geochronology)
For more, visit Paleogene_first_appearance on Power Thesaurus
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APASmart Define. (1970). paleogene first appearance thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/paleogene_first_appearance/thesaurus/narrower
ChicagoSmart Define. 1970. "paleogene first appearance thesaurus" https://smartdefine.org/paleogene_first_appearance/thesaurus/narrower (accessed September 27, 2026).
HarvardSmart Define 1970, paleogene first appearance thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/paleogene_first_appearance/thesaurus/narrower>.
MLASmart Define. "paleogene first appearance thesaurus" 1 January 1970. Web. 27 September 2026. <https://smartdefine.org/paleogene_first_appearance/thesaurus/narrower>