ammonites

Geringian age/stage

General information
Lower boundary: equal to 30.8 Ma (see scale)
Upper boundary: equal to 26.3 Ma (see scale)
Continent: North America
See collections within this interval
See map of collections within this interval
Key correlations
Period: Paleogene
Epoch: Oligocene
10 million year bin: Cenozoic 4
Contained within
  • Oligocene
  • Hsandagolian
  • MP 25
  • Landon
  • Paleogene
  • Tertiary
  • Cenozoic
  • Phanerozoic
    • Previous interval
  • Whitneyan
    • Next interval
  • Monroecreekian
    • Shares base with
  • Arikareean, early Early Arikareean, early Late Arikareean, late Early Arikareean, late Late Arikareean
    • Overlaps with
  • Duntroonian (27.3 to 25.2 Ma)
  • Late/Upper Oligocene (28.4 to 23.03 Ma)
  • Chattian (28.4 to 23.03 Ma)
  • Tabenbulakian (28.4 to 23.03 Ma)
  • MP 30 (28.4 to 23.03 Ma)
  • MP 29 (28.4 to 23.03 Ma)
  • MP 28 (28.4 to 23.03 Ma)
  • MP 27 (28.4 to 23.03 Ma)
  • MP 26 (28.4 to 23.03 Ma)
  • Deseadan (29.0 to 21.0 Ma)
  • Early/Lower Oligocene (33.9 to 28.4 Ma)
  • Rupelian (33.9 to 28.4 Ma)
  • Kekeamuan (33.9 to 28.4 Ma)
  • MP 24 (33.9 to 28.4 Ma)
  • MP 23 (33.9 to 28.4 Ma)
  • MP 22 (33.9 to 28.4 Ma)
  • MP 21 (33.9 to 28.4 Ma)
  • Whaingaroan (34.3 to 27.3 Ma)
  • Tinguirirican (36.0 to 29.0 Ma)
    • Appears in scale
  • North American Land Mammal Ages (2000)

    • Interval name: