Type
Zone
Age range
388–387.95 Ma

International Timescale

Middle Devonian
Givetian
Eifelian

Conodont Zonation

Polygnathus hemiansatus
Polygnathus ensensis
Tortodus knockelianus knockelianus
388.002388.000387.998387.996387.994387.992387.990387.988387.986387.984387.982387.980387.978387.976387.974387.972387.970387.968387.966387.964387.962387.960387.958387.956387.954387.952387.950387.948

Macrostrat

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