Type
Age
Age range
493–486.7 Ma

International Timescale

Early Ordovician
Tremadocian
Furongian
Stage 10
Jiangshanian

North American Regional

Skullrockian
Sunwaptan
Steptoean
493.0492.5492.0491.5491.0490.5490.0489.5489.0488.5488.0487.5487.0486.5

Macrostrat

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