Type
Zone
Age range
290.1–285 Ma

International Timescale

Cisuralian
Artinskian
Sakmarian

Conodont Zonation

Sweetognathus clarki
Sweetognathus whitei
Sweetognathus anceps-Mesogondolella bisselli
290.2290.0289.8289.6289.4289.2289.0288.8288.6288.4288.2288.0287.8287.6287.4287.2287.0286.8286.6286.4286.2286.0285.8285.6285.4285.2285.0284.8

Macrostrat

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