Type
Zone
Age range
218.3–217.5 Ma

International Timescale

Late Triassic
Norian

Ammonite Zonation - Boreal

Drepanites rutherfordi
Juvavites magnus
Malayites dawsoni
218.3218.3218.2218.2218.1218.1218.0217.9217.9217.8217.8217.8217.7217.7217.6217.6217.5

Macrostrat

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