ammonites

Ayusokkanian age/stage

General information
Lower boundary: after 505 Ma (based on Undillan)
Upper boundary: before 498.5 Ma (based on Idamean)
Continent: Asia
See collections within this interval
See map of collections within this interval
Key correlations
Period: Cambrian
Contained within
  • Cambrian
  • Paleozoic
  • Phanerozoic
    • Previous intervals
  • Amgan
  • Floran
  • Taijangian
  • Delamaran
  • Tyesaian
    • Next intervals
  • Ketyan
  • Yurakian
  • Iverian
  • Taoyuanian
  • Sunwaptan
  • Batyrbaian
  • Aksayan
  • Niuchehean
    • Contains
  • Boomerangian, Guzhangian
    • Shares base with
  • Mayan, Undillan, Wangcunian, Zhanarykian
    • Shares top with
  • Ensyan, Idamean, Lincolnian, Maduan, Marjumian, Mindyallan, Nganasanian, Paibian, Waergangian, Youshuanian
    • Overlaps with
  • Olentian (501.0 to 484.5 Ma)
  • Merioneth (501.0 to 488.3 Ma)
  • Dolgellian (501.0 to 488.3 Ma)
  • Maentwrogian (501.0 to 488.3 Ma)
  • Dolgelly (501.0 to 488.3 Ma)
  • Ffestiniog (501.0 to 488.3 Ma)
  • Maentwrog (501.0 to 488.3 Ma)
  • Trempealeauan (501.0 to 488.3 Ma)
  • Franconian (501.0 to 488.3 Ma)
  • Dresbachian (501.0 to 488.3 Ma)
  • Furongian (501.0 to 488.3 Ma)
  • Tavgian (501.0 to 488.3 Ma)
  • Millardan (501.0 to 488.3 Ma)
  • Steptoean (501.0 to 488.3 Ma)
  • Sakian (501.0 to 488.3 Ma)
  • Merionethian (501.0 to 488.3 Ma)
  • St Davids (513.0 to 501.0 Ma)
  • Menevian (513.0 to 501.0 Ma)
  • Solvan (513.0 to 501.0 Ma)
  • Clogau (513.0 to 501.0 Ma)
  • Gamlan (513.0 to 501.0 Ma)
  • Barmouth (513.0 to 501.0 Ma)
  • Hafotty (513.0 to 501.0 Ma)
  • Albertian (513.0 to 501.0 Ma)
  • Middle Cambrian (513.0 to 501.0 Ma)
  • Arcadian (513.0 to 501.0 Ma)
  • Wulingian (513.0 to 501.0 Ma)
    • Appears in scale
  • Gradstein Cambrian of Kazahkstan (2004)

    • Interval name: