ammonites

Orellan age/stage

General information
Lower boundary: equal to 33.9 Ma (based on Rupelian)
Upper boundary: equal to 33.3 Ma (see scale)
Continent: North America
See collections within this interval
See map of collections within this interval
Key correlations
Period: Paleogene
Epoch: Oligocene
Subepoch: Early/Lower Oligocene
Stage: Rupelian
10 million year bin: Cenozoic 4
Contained within
  • Whaingaroan
  • Landon
  • Tinguirirican
  • Paleogene
  • 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 interval
  • Whitneyan
    • Shares base with
  • Early/Lower Oligocene, Hsandagolian, Kekeamuan, MP 21, MP 22, MP 23, MP 24, MP 25, Oligocene, Rupelian
    • Appears in scales
  • North American Land Mammal Ages (2000)
  • North American Provincial Ages (1990)
  • North American Mammal Ages (1987)

    • Interval name: