Type
Zone
Age range
153.7–152.4 Ma

International Timescale

Late Jurassic
Kimmeridgian

Ammonite Zonation - Boreal

Aulacostephanus autissiodorensis
Aulacostephanus eudoxus
Aulacostephanus mutabilis
153.7153.6153.5153.4153.3153.2153.1153.0152.9152.8152.7152.6152.5152.4

Macrostrat

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