Type
Zone
Age range
175–174.8 Ma

International Timescale

Early Jurassic
Toarcian

Ammonite Zonation - Boreal

Pleydellia aalensis
Dumortieria levesquei
Grammoceras thouarsense
175.00174.99174.98174.97174.96174.95174.94174.93174.92174.91174.90174.89174.88174.87174.86174.85174.84174.83174.82174.81174.80

Macrostrat

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