Type
Zone
Age range
190.8–189.5 Ma

International Timescale

Early Jurassic
Pliensbachian

Ammonite Zonation - Boreal

Tragophylloceras ibex
Uptonia jamesoni
Echinoceras raricostatum
190.8190.7190.6190.5190.4190.3190.2190.1190.0189.9189.8189.7189.6189.5

Macrostrat

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