Type
Zone
Age range
452.3–450 Ma

International Timescale

Late Ordovician
Katian

Conodont Zonation

Oulodus velicuspis
Belodina confluens
Plectodina tenuis
452.4452.3452.2452.1452.0451.9451.8451.7451.6451.5451.4451.3451.2451.1451.0450.9450.8450.7450.6450.5450.4450.3450.2450.1450.0449.9

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