Type
Zone
Age range
244–243.5 Ma

International Timescale

Middle Triassic
Anisian

Ammonite Zonation - Boreal

Frechites chischa
Eogymnotoceras deleeni
Anagymnotoceras varium
244.02244.00243.98243.96243.94243.92243.90243.88243.86243.84243.82243.80243.78243.76243.74243.72243.70243.68243.66243.64243.62243.60243.58243.56243.54243.52243.50243.48

Macrostrat

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