Type
Zone
Age range
184.2–182.7 Ma

International Timescale

Early Jurassic
Toarcian
Pliensbachian

Ammonite Zonation - Boreal

Dactylioceras tenuicostatum
Pleuroceras spinatum
Amaltheus margaritatus
184.2184.1184.0183.9183.8183.7183.6183.5183.4183.3183.2183.1183.0182.9182.8182.7

Macrostrat

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