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Gnathodus semiglaber-Polygnathus communis
637
Type
Zone
Age range
348–346.7
Ma
International Timescale
Mississippian
Visean
Tournaisian
Conodont Zonation
Gnathodus pseudosemiglaber-Scallioganthus anchoralis
Gnathodus semiglaber-Polygnathus communis
Dollimae bouckaerti
348.0
347.9
347.8
347.7
347.6
347.5
347.4
347.3
347.2
347.1
347.0
346.9
346.8
346.7
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