Type
Zone
Age range
137.6–136.8 Ma

International Timescale

Early Cretaceous
Valanginian
Berriasian

Ammonite Zonation - Boreal

Prodichotomites
Polyptychites
Paratollia/Platylenticeras
137.6137.6137.5137.4137.4137.3137.3137.3137.2137.2137.1137.1137.0136.9136.9136.8136.8

Macrostrat

Data

Platform

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