ammonites

middle Late Ordovician age/stage

General information
Lower boundary: equal to 455.8 Ma (based on Katian)
Upper boundary: equal to 445.6 Ma (based on Katian)
Continent: global
See collections within this interval
See map of collections within this interval
Key correlations
Period: Ordovician
Epoch: Late/Upper Ordovician
Contained within
  • Sherman
  • Late/Upper Ordovician
  • Aijiashan
  • Xiaoxita
  • Shikou
  • Ordovician
  • Paleozoic
  • Phanerozoic
    • Previous intervals
  • Longvillian
  • Soudleyan
  • Harnagian
  • Zahorany
  • Vinice
  • Letna
  • Keila
  • Idavere
  • Kirkfield
  • Rockland
  • Burrellian
  • early Late Ordovician
  • Sandbian
    • Next intervals
  • Hirnantian
  • Kosov
  • Porkuni
  • Gamach
  • Kosovian
  • late Late Ordovician
    • Equivalent to
  • Katian
    • Contains
  • Maysvillian, Nabala, Onnian, Rawtheyan
    • Shares base with
  • Actonian, Cheneyan, Marshbrookian, Rakvere, Streffordian, Woolstonian
    • Shares top with
  • Bohdalec, Cautleyan, Kralodvorian, Kraluv Dvur, Maysville, Pirgu, Pusgillian, Richmond, Vormsi
    • Overlaps with
  • Ashgill (449.5 to 443.7 Ma)
  • Gamachian (449.5 to 443.7 Ma)
  • Richmondian (449.5 to 443.7 Ma)
  • Bolindian (449.5 to 443.7 Ma)
  • Qiantianjiang (449.5 to 443.7 Ma)
  • Wufeng (449.5 to 443.7 Ma)
  • Chientangkiangian (449.5 to 443.7 Ma)
  • Ashgillian (449.5 to 443.7 Ma)
  • Harju (452.0 to 443.7 Ma)
  • Cincinnatian (452.5 to 443.7 Ma)
  • Eastonian (456.1 to 449.5 Ma)
  • Johvi (457.5 to 449.5 Ma)
  • Oandu (457.5 to 452.0 Ma)
  • Mohawkian (457.5 to 452.5 Ma)
  • Caradoc (460.9 to 449.5 Ma)
  • Late/Upper Llandeilo (460.9 to 449.5 Ma)
  • Middle Llandeilo (460.9 to 449.5 Ma)
  • Kukruse (460.9 to 449.5 Ma)
  • Edenian (460.9 to 449.5 Ma)
  • Trentonian (460.9 to 449.5 Ma)
  • Wildernessian (460.9 to 449.5 Ma)
  • Ashbyan (460.9 to 449.5 Ma)
  • Chatfieldian (460.9 to 449.5 Ma)
  • Turinian (460.9 to 449.5 Ma)
  • Berounian (460.9 to 449.5 Ma)
  • Hanjiang (460.9 to 449.5 Ma)
  • Neichiashanian (460.9 to 449.5 Ma)
  • Haljala (460.9 to 449.5 Ma)
  • Caradocian (460.9 to 449.5 Ma)
  • Franklinian (460.9 to 449.5 Ma)
  • Kirkfieldian (460.9 to 449.5 Ma)
  • Rocklandian (460.9 to 449.5 Ma)
  • Shermanian (460.9 to 449.5 Ma)
  • Blackriveran (460.9 to 449.5 Ma)
  • Viru (463.5 to 452.0 Ma)
  • Llandeilo (466.0 to 449.5 Ma)
    • Appears in scales
  • Bergström et al. Ordovician Stages of Webby et al. (2006)
  • Gradstein 7: Stages (2004)
  • Webby et al. Ordovician Stages (2004)

    • Interval name: