Type
Zone
Age range
441.1–440.5 Ma

International Timescale

Llandovery
Aeronian
Rhuddanian

Conodont Zonation

Pterospathodus tenuis
Aspelunda expansa
Distomodus kentuckyensis
441.10441.05441.00440.95440.90440.85440.80440.75440.70440.65440.60440.55440.50

Macrostrat

Data

Platform

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