Type
Zone
Age range
166.8–166.6 Ma

International Timescale

Middle Jurassic
Bathonian

Ammonite Zonation - Boreal

Procerites hodsoni
Morrisiceras morrisi
Tulites subcontractus
166.80166.79166.78166.77166.76166.75166.74166.73166.72166.71166.70166.69166.68166.67166.66166.65166.64166.63166.62166.61166.60

Macrostrat

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