Type
Zone
Age range
464.4–463.7 Ma

International Timescale

Middle Ordovician
Darriwilian

Conodont Zonation

Phragmodus polonicus
Histiodella holodentata
Histiodella sinuosa
464.4464.4464.3464.3464.2464.1464.1464.1464.0463.9463.9463.9463.8463.8463.7

Macrostrat

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