Type
Zone
Age range
192.8–190.8 Ma

International Timescale

Early Jurassic
Pliensbachian

Ammonite Zonation - Boreal

Uptonia jamesoni
Echinoceras raricostatum
Oxynoticeras oxynotum
192.8192.7192.6192.5192.4192.3192.2192.1192.0191.9191.8191.7191.6191.5191.4191.3191.2191.1191.0190.9190.8

Macrostrat

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