Type
Zone
Age range
164.2–163.8 Ma

International Timescale

Middle Jurassic
Callovian

Ammonite Zonation - Boreal

Quenstedtoceras lamberti
Peltoceras athleta
Erymnoceras coronatum
164.20164.18164.16164.14164.12164.10164.08164.06164.04164.02164.00163.98163.96163.94163.92163.90163.88163.86163.84163.82163.80

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