Type
Zone
Age range
132.5–132.3 Ma

International Timescale

Early Cretaceous
Hauterivian

Ammonite Zonation - Boreal

Simbirskites variabilis
Simbirskites marginatus
Craspedodiscus gottschei
132.50132.49132.48132.47132.46132.45132.44132.43132.42132.41132.40132.39132.38132.37132.36132.35132.34132.33132.32132.31132.30

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