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Gradstein Cambrian-Middle Ordovician of Australasia

 Interval Maximum correlate   Minimum correlate Ma
Yapeenian Arenig
468.9
Castlemainian Arenig
472
Chewtonian Arenig
473.9
Bendigonian Arenig
476.8
Lancefieldian Tremadoc Arenig
Warendian Tremadoc

"pre-Lancefieldian"

490
Datsonian Mansian
491.5
Payntonian Ketyan
494
Iverian Yurakian Ketyan
498.5
Idamean Tavgian Ensyan
501
Mindyallan Nganasanian

possibly Tavgian in part

503
Boomerangian Mayan
504
Undillan Mayan
505
Floran Amgan

possibly Mayan in part

507
Templetonian Amgan

upper and lower boundaries not indicated; lower part could be partially Toyonian and upper part partially Mayan; lower boundary estimate is arbitrary

510
Ordian Toyonian

upper boundary not indicated; could be in the Amgan

513

Authorizer: J. Alroy   Enterer: J. Alroy

Continent: Australia   Rank of each interval: age/stage

Basis of scale: paleontological  

Reference: F. M. Gradstein et al. 2004

Comments: boundary age esimates based on Cooper 2004 next youngest stage is Darriwillian, which is treated as an international unit

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