Type
Zone
Age range
303.7–302.7 Ma

International Timescale

Pennsylvanian
Gzhelian
Kasimovian

Conodont Zonation

Streptognathodus vitali
Streptognathodus simulator
Streptognathodus firmus
303.7303.6303.6303.6303.5303.4303.4303.4303.3303.3303.2303.1303.1303.1303.0302.9302.9302.9302.8302.8302.7

Macrostrat

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