ammonites

Osagean age/stage

General information
Lower boundary: equal to 353.8 Ma (based on Ivorian)
Upper boundary: before 342.8 Ma (based on Arundian)
Continent: North America
See collections within this interval
See map of collections within this interval
Key correlations
Period: Carboniferous
Contained within
  • Mississippian
  • Carboniferous
  • Sherman
  • Paleozoic
  • Phanerozoic
    • Previous intervals
  • Hastarian
  • Pilton
  • Kinderhookian
  • Cherepetsian
  • Karakubian
  • Upinian
  • Malevian
  • Gumerovian
    • Next intervals
  • Holkerian
  • Aleksian
  • Tulian
    • Contains
  • Chadian, Radaevian
    • Shares base with
  • Ivorian, Kizolovian, Kosvinian
    • Shares top with
  • Arundian, Bobrikovian
    • Overlaps with
  • Meramecian (345.0 to 336.0 Ma)
  • Visean (345.3 to 326.4 Ma)
  • Middle Mississippian (345.3 to 326.4 Ma)
  • Jiusian (345.3 to 339.4 Ma)
  • Tournaisian (360.7 to 345.3 Ma)
  • Early/Lower Mississippian (360.7 to 345.3 Ma)
  • Tangbagouan (360.7 to 345.3 Ma)
    • Appears in scales
  • Subcommission on Carboniferous Stratigraphy North American Stages (2006)
  • Gradstein Carboniferous of North America (2004)
  • Harland Carboniferous of the USA (1990)

    • Interval name: