ammonites

Chazyan age/stage

General information
Lower boundary: after 468.1 Ma (based on Darriwilian)
Upper boundary: equal to 460.9 Ma (based on Darriwilian)
Continent: North America
See collections within this interval
See map of collections within this interval
Key correlations
Period: Ordovician
Epoch: Middle Ordovician
Stage: Darriwilian
Contained within
  • Darriwilian
  • Llanvirnian
  • Guniu
  • Hulo
  • Zhejiangian
  • Whiterockian
  • Ordovician
  • Paleozoic
  • Phanerozoic
    • Previous intervals
  • Volkhov
  • Cassinian
  • Jefferson
  • Rangerian
  • Arenigian
  • Dawan
  • Daobaowan
  • Ningkuo
  • Hunjiang
  • Yushanian
  • Valhallan
  • Langevoja
  • Vaana
  • Saka
  • Volkhovian
  • Canadian
  • Jeffersonian
  • early Middle Ordovician
  • Dapingian
    • 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, Sarka
    • Shares base with
  • Kunda
    • Shares top with
  • Abereiddian, Aluoja, Aseri, Dobrotiva, Early/Lower Llandeilo, Lasnamagi, Late/Upper Llanvirn, Llandeilian, Llanvirn, Middle Ordovician, Oretanian, Uhaku, Yangtzi
    • Overlaps with
  • Viru (463.5 to 452.0 Ma)
  • Llandeilo (466.0 to 449.5 Ma)
  • Chazy (466.0 to 457.5 Ma)
  • Whiterock (468.1 to 460.9 Ma)
  • Marmor (468.1 to 460.9 Ma)
  • Yapeenian (468.9 to 466.0 Ma)
  • Fennian (471.8 to 466.0 Ma)
  • Valaste (471.8 to 466.0 Ma)
  • Hunderum (471.8 to 466.0 Ma)
  • Arenig (478.6 to 466.0 Ma)
  • Klabava (478.6 to 466.0 Ma)
  • Oeland (488.3 to 463.5 Ma)
    • Appears in scale
  • Ross et al. 1982 Ordovician Stages of North America I (1998)

    • Interval name: