Type
Zone
Age range
510.5–509 Ma

International Timescale

Series 2
Stage 4

Trilobite Zonation - Laurentia

Plagiura-Poliella
Amecephalus arrojosensis
Eokochaspis nodosa
510.5510.4510.3510.2510.1510.0509.9509.8509.7509.6509.5509.4509.3509.2509.1509.0

Macrostrat

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