Type
Zone
Age range
233.5–232.6 Ma

International Timescale

Late Triassic
Carnian

Ammonite Zonation - Boreal

Tropites welleri
Tropites dilleri
Sirenites nanseni
233.5233.4233.4233.3233.3233.3233.2233.2233.1233.1233.0232.9232.9232.8232.8232.8232.7232.7232.6

Macrostrat

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