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5 entries under oligocene topic. ×

8
Chattian first appearance(expression, geohistory, appearance, period)
8
Rupelian first appearance(expression, geohistory, appearance, period)
7
paleogene first appearance(expression, appearance, period)
4
paleocene first appearance(expression, geohistory, period)
1
eocene first appearance(expression, geohistory, appearance, period)
For more, visit Extant_oligocene_first_appearance on Power Thesaurus
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APASmart Define. (1970). extant oligocene first appearance thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/extant_oligocene_first_appearance/thesaurus/related
ChicagoSmart Define. 1970. "extant oligocene first appearance thesaurus" https://smartdefine.org/extant_oligocene_first_appearance/thesaurus/related (accessed October 1, 2026).
HarvardSmart Define 1970, extant oligocene first appearance thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/extant_oligocene_first_appearance/thesaurus/related>.
MLASmart Define. "extant oligocene first appearance thesaurus" 1 January 1970. Web. 1 October 2026. <https://smartdefine.org/extant_oligocene_first_appearance/thesaurus/related>