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7 entries under period topic. ×

4
Rupelian first appearance(expression, geohistory, appearance, oligocene)
4
Extant Oligocene first appearance(expression, geohistory, appearance, oligocene)
4
Extant Rupelian first appearance(expression, geohistory, geogistory, oligocene)
4
eocene first appearance(expression, geohistory, oligocene)
4
extant paleogene first appearance(expression, geohistory, oligocene)
4
paleogene first appearance(expression, appearance, oligocene)
0
paleocene first appearance(expression, geohistory, oligocene)
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APASmart Define. (1970). chattian first appearance thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/chattian_first_appearance/thesaurus/related
ChicagoSmart Define. 1970. "chattian first appearance thesaurus" https://smartdefine.org/chattian_first_appearance/thesaurus/related (accessed October 1, 2026).
HarvardSmart Define 1970, chattian first appearance thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/chattian_first_appearance/thesaurus/related>.
MLASmart Define. "chattian first appearance thesaurus" 1 January 1970. Web. 1 October 2026. <https://smartdefine.org/chattian_first_appearance/thesaurus/related>