Type
Zone
Age range
141–140.2 Ma

International Timescale

Early Cretaceous
Berriasian

Ammonite Zonation - Boreal

Surites stenomphalus
Surites icenii
Hectoroceras kochi
141.0140.9140.9140.8140.8140.8140.7140.7140.6140.6140.5140.4140.4140.3140.3140.3140.2

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