Type
Age
Age range
491–486.85 Ma
Ordovician
Early Ordovician
Tremadocian
Cambrian
Furongian
Stage 10
Jiangshanian
491.0490.8490.6490.4490.2490.0489.8489.6489.4489.2489.0488.8488.6488.4488.2488.0487.8487.6487.4487.2487.0486.8