Type
Zone
Age range
344–340 Ma

International Timescale

Mississippian
Visean

Conodont Zonation

Gnathodus praebillineatus
Gnathodus texanus
Gnathodus pseudosemiglaber-Scallioganthus anchoralis
344.0343.8343.6343.4343.2343.0342.8342.6342.4342.2342.0341.8341.6341.4341.2341.0340.8340.6340.4340.2340.0

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