Type
Zone
Age range
480.3–480 Ma

International Timescale

Early Ordovician
Tremadocian

Conodont Zonation

Macerodus dianae
Rossodus manitouensis
Cordylodus angulatus
480.30480.28480.26480.24480.22480.20480.18480.16480.14480.12480.10480.08480.06480.04480.02480.00

Macrostrat

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