Type
Zone
Age range
318.6–317 Ma

International Timescale

Pennsylvanian
Bashkirian

Conodont Zonation

Neognathodus atokaensis
Declinognathodus marginodosus
Idiognathodus sinuosus
318.6318.5318.4318.3318.2318.1318.0317.9317.8317.7317.6317.5317.4317.3317.2317.1317.0

Macrostrat

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