ammonites

Yapeenian age/stage

General information
Lower boundary: equal to 468.9 Ma (see scale)
Upper boundary: equal to 466 Ma (based on Arenig)
Continent: Australia
See collections within this interval
See map of collections within this interval
Key correlations
Period: Ordovician
Epoch: Middle Ordovician
10 million year bin: Ordovician 2
Contained within
  • Middle Ordovician
  • Whiterockian
  • Yangtzi
  • Oeland
  • Ordovician
  • Paleozoic
  • Phanerozoic
    • Previous interval
  • Castlemainian
    • Next intervals
  • Llandeilo
  • Llanvirn
  • Early/Lower Llandeilo
  • Early/Lower Llanvirn
  • Dobrotiva
  • Uhaku
  • Chazy
  • Llandeilian
  • Abereiddian
  • Oretanian
  • Aluoja
    • Shares top with
  • Arenig, Fennian, Hunderum, Klabava, Sarka, Valaste
    • Overlaps with
  • Whiterock (468.1 to 460.9 Ma)
  • Darriwilian (468.1 to 460.9 Ma)
  • Llanvirnian (468.1 to 460.9 Ma)
  • Guniu (468.1 to 460.9 Ma)
  • Hulo (468.1 to 460.9 Ma)
  • Zhejiangian (468.1 to 460.9 Ma)
  • Chazyan (468.1 to 460.9 Ma)
  • Marmor (468.1 to 460.9 Ma)
  • Kunda (468.1 to 463.5 Ma)
  • Volkhov (471.8 to 468.1 Ma)
  • Rangerian (471.8 to 468.1 Ma)
  • Langevoja (471.8 to 468.1 Ma)
  • Vaana (471.8 to 468.1 Ma)
  • Saka (471.8 to 468.1 Ma)
  • Volkhovian (471.8 to 468.1 Ma)
  • early Middle Ordovician (471.8 to 468.1 Ma)
  • Dapingian (471.8 to 468.1 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)
  • 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 Cambrian-Middle Ordovician of Australasia (2004)
  • Webby 1998 Australasian Tremadocian and Arenigian Stages (1998)

    • Interval name: