Type
Subchron
Age range
163.88–163.76 Ma

International Timescale

Middle Jurassic
Callovian

Geomagnetic Polarity Subchron

M37n.2n
M37r
M38n.1n
163.88163.88163.88163.87163.87163.86163.85163.85163.84163.84163.84163.83163.82163.82163.81163.81163.81163.80163.79163.79163.78163.78163.78163.77163.76163.76163.75

Macrostrat

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