Type
Zone
Age range
423.6–422.7 Ma

International Timescale

Pridoli
Ludlow
Ludfordian

Conodont Zonation

Ozarkodina eosteinhornensis
Ozarkodina crispa
Ozarkodina snajdri
423.6423.6423.5423.4423.4423.4423.3423.3423.2423.1423.1423.1423.0422.9422.9422.9422.8422.8422.7

Macrostrat

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