5 entries under period topic. ×

1
Bartonian first appearance(expression, appearance, geochronology)
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Extant Eocene first appearance(expression, appearance, geochronology)
1
Lutetian first appearance(expression, appearance, geochronology)
1
Priabonian first appearance(expression, appearance, geochronology)
1
Ypresian first appearance(expression, appearance, geochronology)
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APASmart Define. (1970). eocene first appearance thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/eocene_first_appearance/thesaurus/narrower
ChicagoSmart Define. 1970. "eocene first appearance thesaurus" https://smartdefine.org/eocene_first_appearance/thesaurus/narrower (accessed September 29, 2026).
HarvardSmart Define 1970, eocene first appearance thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/eocene_first_appearance/thesaurus/narrower>.
MLASmart Define. "eocene first appearance thesaurus" 1 January 1970. Web. 29 September 2026. <https://smartdefine.org/eocene_first_appearance/thesaurus/narrower>