Type
Zone
Age range
168.3–167.3 Ma

International Timescale

Middle Jurassic
Bathonian
Bajocian

Ammonite Zonation - Boreal

Procerites progracilis
Zigzagiceras zigzag
Parkinsonia parkinsoni
168.3168.3168.2168.2168.1168.1168.0167.9167.9167.8167.8167.8167.7167.7167.6167.6167.5167.4167.4167.3167.3

Macrostrat

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