ammonites
banner
Gateway to the Paleobiology Database

Oligocene epoch

General information
Lower boundary: equal to 33.9 Ma (based on Rupelian)
Upper boundary: equal to 23.03 Ma (based on Chattian)
Continent: global
See collections within this interval
See map of collections within this interval
Key correlations
Period: Paleogene
10 million year bin: Cenozoic 4
Overlaps with
  • Harrisonian (24.8 to 20.43 Ma)
  • Waitakian (25.2 to 21.7 Ma)
  • Deseadan (29.0 to 21.0 Ma)
  • Arikareean (30.8 to 20.43 Ma)
  • late Late Arikareean (30.8 to 20.43 Ma)
  • early Late Arikareean (30.8 to 20.43 Ma)
  • late Early Arikareean (30.8 to 20.43 Ma)
  • early Early Arikareean (30.8 to 20.43 Ma)
  • Whaingaroan (34.3 to 27.3 Ma)
  • Tinguirirican (36.0 to 29.0 Ma)
  • Interval name: