Type
Zone
Age range
167–166.8 Ma

International Timescale

Middle Jurassic
Bathonian

Ammonite Zonation - Boreal

Morrisiceras morrisi
Tulites subcontractus
Procerites progracilis
167.00166.99166.98166.97166.96166.95166.94166.93166.92166.91166.90166.89166.88166.87166.86166.85166.84166.83166.82166.81166.80

Macrostrat

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