Type
Zone
Age range
169.5–169 Ma

International Timescale

Middle Jurassic
Bajocian

Ammonite Zonation - Boreal

Garantiana garantiana
Strenoceras niortense
Stephanoceras humphriesianum
169.52169.50169.48169.46169.44169.42169.40169.38169.36169.34169.32169.30169.28169.26169.24169.22169.20169.18169.16169.14169.12169.10169.08169.06169.04169.02169.00168.98

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