Type
Zone
Age range
455.8–454.7 Ma

International Timescale

Late Ordovician
Sandbian

Conodont Zonation

Belodina compressa
Erismodus quadridactylus
Plectodina aculeata
455.8455.8455.7455.6455.6455.6455.5455.4455.4455.4455.3455.3455.2455.1455.1455.1455.0454.9454.9454.9454.8454.8454.7

Macrostrat

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