ammonites

Onnian subage/stage

General information
Lower boundary: equal to 452 Ma (based on Harju)
Upper boundary: equal to 449.5 Ma (based on Caradoc)
Continent: Europe
See collections within this interval
See map of collections within this interval
Key correlations
Period: Ordovician
Epoch: Late/Upper Ordovician
Stage: middle Late Ordovician
10 million year bin: Ordovician 4
Contained within
  • Cincinnatian
  • Rawtheyan
  • middle Late Ordovician
  • Katian
  • Bohdalec
  • Sherman
  • Late/Upper Ordovician
  • Aijiashan
  • Xiaoxita
  • Shikou
  • Ordovician
  • Paleozoic
  • Phanerozoic
    • Previous intervals
  • Actonian
  • Marshbrookian
  • Rakvere
  • Oandu
  • Viru
  • Cheneyan
  • Woolstonian
    • Next intervals
  • Ashgill
  • Cautleyan
  • Pusgillian
  • Kraluv Dvur
  • Pirgu
  • Richmond
  • Gamachian
  • Richmondian
  • Kralodvorian
  • Bolindian
  • Qiantianjiang
  • Wufeng
  • Chientangkiangian
  • Ashgillian
    • Contains
  • Maysvillian, Nabala
    • Shares base with
  • Harju, Maysville, Vormsi
    • Shares top with
  • Ashbyan, Berounian, Blackriveran, Caradoc, Caradocian, Chatfieldian, Eastonian, Edenian, Franklinian, Haljala, Hanjiang, Johvi, Kirkfieldian, Kukruse, Late/Upper Llandeilo, Llandeilo, Middle Llandeilo, Neichiashanian, Rocklandian, Shermanian, Streffordian, Trentonian, Turinian, Wildernessian
    • Appears in scales
  • Webby 1998 British Substages (1998)
  • Harland 6: Stages (1990)

    • Interval name: