ammonites

Middle Ordovician epoch

General information
Lower boundary: equal to 471.8 Ma (based on Dapingian)
Upper boundary: equal to 460.9 Ma (based on Darriwilian)
Continent: global
See collections within this interval
See map of collections within this interval
Key correlations
Period: Ordovician
Contained within
  • Ordovician
  • Paleozoic
  • Phanerozoic
    • Previous intervals
  • Early/Lower Ordovician
  • Latorp
  • Ibexian
  • Blackhillsian
  • Tulean
  • Whitlandian
  • Moridunian
  • Billingen
  • Hunneberg
  • Latorpian
  • late Early Ordovician
  • Floian
    • Next intervals
  • Late/Upper Ordovician
  • Caradoc
  • Costonian
  • Late/Upper Llandeilo
  • Middle Llandeilo
  • Letna
  • Liben
  • Keila
  • Idavere
  • Kukruse
  • Edenian
  • Black River
  • Trentonian
  • Wildernessian
  • Ashbyan
  • Chatfieldian
  • Turinian
  • Aurelucian
  • Volfreyan
  • Dobrotivian
  • Berounian
  • Gisbornian
  • Aijiashan
  • Xiaoxita
  • Shikou
  • Hanjiang
  • Neichiashanian
  • Haljala
  • Caradocian
  • Franklinian
  • Kirkfieldian
  • Rocklandian
  • Shermanian
  • Blackriveran
  • early Late Ordovician
  • Sandbian
    • Contains
  • Early/Lower Llanvirn, Kunda, Sarka, Yapeenian
    • Shares base with
  • Dapingian, Fennian, Hunderum, Langevoja, Rangerian, Saka, Vaana, Valaste, Volkhov, Volkhovian, Whiterockian, early Middle Ordovician
    • Shares top with
  • Abereiddian, Aluoja, Aseri, Chazyan, Darriwilian, Dobrotiva, Early/Lower Llandeilo, Guniu, Hulo, Lasnamagi, Late/Upper Llanvirn, Llandeilian, Llanvirn, Llanvirnian, Marmor, Oretanian, Uhaku, Whiterock, Yangtzi, Zhejiangian
    • Overlaps with
  • Viru (463.5 to 452.0 Ma)
  • Llandeilo (466.0 to 449.5 Ma)
  • Chazy (466.0 to 457.5 Ma)
  • Castlemainian (472.0 to 468.9 Ma)
  • Arenig (478.6 to 466.0 Ma)
  • Klabava (478.6 to 466.0 Ma)
  • Cassinian (478.6 to 468.1 Ma)
  • Arenigian (478.6 to 468.1 Ma)
  • Dawan (478.6 to 468.1 Ma)
  • Daobaowan (478.6 to 468.1 Ma)
  • Ningkuo (478.6 to 468.1 Ma)
  • Yushanian (478.6 to 468.1 Ma)
  • Valhallan (478.6 to 468.1 Ma)
  • Oeland (488.3 to 463.5 Ma)
  • Jefferson (488.3 to 468.1 Ma)
  • Hunjiang (488.3 to 468.1 Ma)
  • Canadian (488.3 to 468.1 Ma)
  • Jeffersonian (488.3 to 468.1 Ma)
    • Appears in scales
  • Gradstein 5: Epochs (2004)
  • Ordovician Series (1998)
  • Harland 3: Subperiods (Ordovician) (1990)

    • Interval name: