ammonites

Stephanian A subage/stage

General information
Lower boundary: equal to 305.9 Ma (based on Khamovnichean)
Upper boundary: equal to 304.8 Ma (based on Khamovnichean)
Continent: Europe
See collections within this interval
See map of collections within this interval
Key correlations
Period: Carboniferous
Epoch: Late/Upper Pennsylvanian
Stage: Kasimovian
10 million year bin: Carboniferous 5
Contained within
  • Kasimovian
  • Stephanian
  • Late/Upper Pennsylvanian
  • Xiaodushanian
  • Dalanian
  • Pennsylvanian
  • Carboniferous
  • Sherman
  • Paleozoic
  • Phanerozoic
    • Previous intervals
  • Krevyakian
  • Cantabrian
  • Desmoinesian
  • Peskovian
    • Next intervals
  • Dorogovilovian
  • Stephanian B
    • Equivalent to
  • Khamovnichean
    • Shares base with
  • Missourian
    • Appears in scales
  • Subcommission on Carboniferous Stratigraphy European Substages (2006)
  • Gradstein Carboniferous Stages of Western Europe (2004)
  • Harland Carboniferous of North West Europe (Subages) (1990)

    • Interval name: