Type
Zone
Age range
240.4–239 Ma

International Timescale

Middle Triassic
Ladinian

Ammonite Zonation - Boreal

Meginoceras meginae
Tuchodiceras poseidon
Eoprotrachyceras matutinum
240.4240.3240.2240.1240.0239.9239.8239.7239.6239.5239.4239.3239.2239.1239.0

Macrostrat

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