Type
Age
Age range
486.85–477.1 Ma

International Timescale

also International Ages
Ordovician
Early Ordovician
Floian
Tremadocian
Cambrian
Furongian
Stage 10

Custom COSUNA

Arenigian
Tremadocian
Trempealeauan

COSUNA

Arenigian
Tremadocian
Trempealeauan

Russian Stages

Floian
Tremadocian
Batyrbaian
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Macrostrat

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