Type
Zone
Age range
172.3–170.07 Ma

International Timescale

Middle Jurassic
Bajocian
Aalenian

Calcareous Nannoplankton Zones

NJ10
NJ9
NJ8
172.4172.3172.2172.1172.0171.9171.8171.7171.6171.5171.4171.3171.2171.1171.0170.9170.8170.7170.6170.5170.4170.3170.2170.1170.0

Macrostrat

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