Type
Zone
Age range
138.5–137.6 Ma

International Timescale

Early Cretaceous
Berriasian

Ammonite Zonation - Boreal

Polyptychites
Paratollia/Platylenticeras
Peregrinoceras albidum
138.5138.4138.4138.3138.3138.3138.2138.2138.1138.1138.0137.9137.9137.8137.8137.8137.7137.7137.6

Macrostrat

Data

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