Type
Zone
Age range
452.8–452.3 Ma

International Timescale

Late Ordovician
Katian
Sandbian

Conodont Zonation

Belodina confluens
Plectodina tenuis
Phragmodus undatus
452.82452.80452.78452.76452.74452.72452.70452.68452.66452.64452.62452.60452.58452.56452.54452.52452.50452.48452.46452.44452.42452.40452.38452.36452.34452.32452.30452.28

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