Type
Zone
Age range
132.8–132.5 Ma

International Timescale

Early Cretaceous
Hauterivian
Valanginian

Ammonite Zonation - Boreal

Simbirskites marginatus
Craspedodiscus gottschei
Milanowskia speetonensis
132.80132.78132.76132.74132.72132.70132.68132.66132.64132.62132.60132.58132.56132.54132.52132.50

Macrostrat

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