Type
Zone
Age range
239–238.3 Ma

International Timescale

Middle Triassic
Ladinian

Ammonite Zonation - Boreal

Macl. maclearni
Meginoceras meginae
Tuchodiceras poseidon
239.0238.9238.9238.8238.8238.8238.7238.7238.6238.6238.5238.4238.4238.3238.3

Macrostrat

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