Type
Zone
Age range
309–307 Ma

International Timescale

Pennsylvanian
Kasimovian
Moscovian

Conodont Zonation

Streptognathodus subexcelsus
Neoghanthodus round-Streptognathodus cancellosus
Neoghanthodus medexultimus-Streptognathodus-concinnus
309.0308.9308.8308.7308.6308.5308.4308.3308.2308.1308.0307.9307.8307.7307.6307.5307.4307.3307.2307.1307.0

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