Type
Zone
Age range
484.4–480.3 Ma

International Timescale

Early Ordovician
Tremadocian

Conodont Zonation

Rossodus manitouensis
Cordylodus angulatus
Iapetognathus fluctivagus
484.4484.2484.0483.8483.6483.4483.2483.0482.8482.6482.4482.2482.0481.8481.6481.4481.2481.0480.8480.6480.4480.2

Macrostrat

Data

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