Type
Zone
Age range
511.1–510.5 Ma

International Timescale

Series 2
Stage 4

Trilobite Zonation - Laurentia

Amecephalus arrojosensis
Eokochaspis nodosa
Olenellus
511.10511.05511.00510.95510.90510.85510.80510.75510.70510.65510.60510.55510.50

Macrostrat

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