Type
Zone
Age range
480–479.8 Ma

International Timescale

Early Ordovician
Tremadocian

Conodont Zonation

Acodus delatus/Oneotodus costatus
Macerodus dianae
Rossodus manitouensis
480.00479.99479.98479.97479.96479.95479.94479.93479.92479.91479.90479.89479.88479.87479.86479.85479.84479.83479.82479.81479.80

Macrostrat

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