ammonites

early Early Arikareean subage/stage

General information
Lower boundary: equal to 30.8 Ma (based on Geringian)
Upper boundary: before 20.43 Ma (based on Aquitanian)
Continent: North America
See collections within this interval
See map of collections within this interval
Contained within
  • Arikareean
  • Tertiary
  • Cenozoic
  • Phanerozoic
    • Previous interval
  • Whitneyan
    • Next intervals
  • Burdigalian
  • Hemingfordian
  • Late/Upper Hemingfordian
  • Early/Lower Hemingfordian
    • Contains
  • Chattian, Deseadan, Duntroonian, Late/Upper Oligocene, MN 1, MP 26, MP 27, MP 28, MP 29, MP 30, Monroecreekian, Tabenbulakian, Waitakian
    • Shares base with
  • Geringian
    • Shares top with
  • Aquitanian, Harrisonian
    • Overlaps with
  • Colhuehuapian (21.0 to 17.5 Ma)
  • Pareora (21.7 to 15.9 Ma)
  • Otaian (21.7 to 19.0 Ma)
  • MN 2 (22.4 to 20.0 Ma)
  • Neogene (23.03 to 2.588 Ma)
  • Miocene (23.03 to 5.332 Ma)
  • Early/Lower Miocene (23.03 to 15.97 Ma)
  • Xiejiaan (23.03 to 16.9 Ma)
  • Agenian (23.03 to 20.0 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)
  • Oligocene (33.9 to 23.03 Ma)
  • Hsandagolian (33.9 to 23.03 Ma)
  • MP 25 (33.9 to 23.03 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)
  • Landon (34.3 to 21.7 Ma)
  • Whaingaroan (34.3 to 27.3 Ma)
  • Tinguirirican (36.0 to 29.0 Ma)
  • Paleogene (65.5 to 23.03 Ma)
    • Appears in scale
  • North American Mammal Subages/Zones: Arikareean - Rancholabrean (1987)

    • Interval name: