ammonites

Atokan age/stage

General information
Lower boundary: after 318.1 Ma (based on Bashkirian)
Upper boundary: before 311.45 Ma (based on Kashirian)
Continent: North America
See collections within this interval
See map of collections within this interval
Key correlations
Period: Carboniferous
10 million year bin: Carboniferous 4
Contained within
  • Carboniferous
  • Sherman
  • Paleozoic
  • Phanerozoic
    • Previous intervals
  • Mississippian
  • Serpukhovian
  • Arnsbergian
  • Pendleian
  • Chesterian
  • Late/Upper Mississippian
  • Protvian
  • Steshevian
  • Tarussian
  • Dewunian
    • Next intervals
  • Podolskian
  • Cantabrian
  • Westphalian D
    • Contains
  • Vereian, Westphalian B
    • Shares base with
  • Alportian, Bashkirian, Cheremshanian, Chokierian, Early/Lower Pennsylvanian, Huashibanian, Kinderscoutian, Krasnopolyanian, Luosuan, Marsdenian, Melekesian, Morrowan, Pennsylvanian, Prikarnian, Severokeltmenian, Voznesenian, Westphalian, Westphalian A, Yeadonian
    • Shares top with
  • Kashirian, Tsninian, Westphalian C
    • Overlaps with
  • Desmoinesian (313.8 to 305.9 Ma)
  • Dalanian (314.6 to 303.4 Ma)
  • Moscovian (314.6 to 306.95 Ma)
  • Middle Pennsylvanian (314.6 to 306.95 Ma)
  • Namurian (326.4 to 314.6 Ma)
  • Zapaltyubian (326.4 to 314.6 Ma)
    • Appears in scales
  • Carboniferous and Early Permian Stages of North America (2012)
  • Subcommission on Carboniferous Stratigraphy North American Stages (2006)
  • Gradstein Carboniferous of North America (2004)
  • Harland Carboniferous of the USA (1990)

    • Interval name: