Type
Zone
Age range
524–521 Ma

International Timescale

Series 2
Stage 3
Terreneuvian
Stage 2

Trilobite Zonation - Laurentia

Fritzaspis
Wyattia
524.0523.8523.6523.4523.2523.0522.8522.6522.4522.2522.0521.8521.6521.4521.2521.0

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