Type
Zone
Age range
486.85–484.4 Ma

International Timescale

Early Ordovician
Tremadocian
Furongian
Stage 10

Conodont Zonation

Cordylodus angulatus
Iapetognathus fluctivagus
486.9486.8486.7486.6486.5486.4486.3486.2486.1486.0485.9485.8485.7485.6485.5485.4485.3485.2485.1485.0484.9484.8484.7484.6484.5484.4484.3

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