Type
Zone
Age range
477.5–473.7 Ma

International Timescale

Early Ordovician
Floian
Tremadocian

Conodont Zonation

Reutterodus andinus
Oepikodus communis
Acodus delatus/Oneotodus costatus
477.6477.4477.2477.0476.8476.6476.4476.2476.0475.8475.6475.4475.2475.0474.8474.6474.4474.2474.0473.8473.6

Macrostrat

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