ammonites

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
Contained within
  • Landon
  • Tertiary
  • Cenozoic
  • Phanerozoic
    • Previous intervals
  • Eocene
  • Late/Upper Eocene
  • Priabonian
  • Chadronian
  • Late/Upper Chadronian
  • Middle Chadronian
  • Early/Lower Chadronian
  • Houldjinian
  • Ergilian
  • Ulangochuian
  • MP 20
  • MP 19
  • MP 18
  • MP 17B
  • MP 17A
    • Next intervals
  • Neogene
  • Miocene
  • Early/Lower Miocene
  • Aquitanian
  • Agenian
  • MN 1
  • Xiejiaan
    • Contains
  • Duntroonian, Geringian, Hsandagolian, MP 25, Monroecreekian, Whitneyan
    • Shares base with
  • Early/Lower Oligocene, Kekeamuan, MP 21, MP 22, MP 23, MP 24, Orellan, Rupelian
    • Shares top with
  • Chattian, Late/Upper Oligocene, MP 26, MP 27, MP 28, MP 29, MP 30, Paleogene, Tabenbulakian
    • 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)
    • Appears in scales
  • 2009 IUGS Cenozoic Epochs (2010)
  • Gradstein 5: Epochs (2004)
  • Harland 4: Epochs (1990)

    • Interval name: