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Gradstein Cambrian of Siberia

 Interval Maximum correlate
Mansian Furongian
Ketyan Furongian
Yurakian Furongian
Ensyan Furongian
Maduan Furongian
Tavgian Furongian
Nganasanian Furongian

shown as Middle Cambrian, but post-Mayan intervals are Late Cambrian = Furongian according to Harland et al., and based on correlation of Gradstein et al. with Mindyallan and late Marjumian, which are Late Cambrian according to Harland et al. and Palmer 1998

Mayan Middle Cambrian
Amgan Middle Cambrian
Toyonian Early/Lower Cambrian

shown as Middle Cambrian, but Early Cambrian according to Harland et al., and shown by Gradstein et al. as being correlated with the Ordian, late Dyeran, and "Lenan," all of which are conventionally Early and not Middle Cambrian

Botomian Early/Lower Cambrian

spelt "Botoman"

Atdabanian Early/Lower Cambrian
Tommotian Early/Lower Cambrian
Nemakit-Daldynian Early/Lower Cambrian

Authorizer: J. Alroy   Enterer: J. Alroy

Continent: global   Rank of each interval: age/stage

Basis of scale: paleontological  

Reference: F. M. Gradstein et al. 2004

Comments: Middle Cambrian restricted to Amgan and Mayan following Harland et al. and other sources

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