Type
Zone
Age range
340–336.8 Ma

International Timescale

Mississippian
Visean

Conodont Zonation

Gnathodus bilineatus
Gnathodus praebillineatus
Gnathodus texanus
340.0339.8339.6339.4339.2339.0338.8338.6338.4338.2338.0337.8337.6337.4337.2337.0336.8

Macrostrat

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