Type
Subchron
Age range
163.76–163.65 Ma

International Timescale

Middle Jurassic
Callovian

Geomagnetic Polarity Subchron

M37n.1r
M37n.2n
M37r
163.76163.75163.75163.75163.74163.74163.73163.72163.72163.72163.71163.71163.70163.69163.69163.69163.68163.68163.67163.66163.66163.66163.65

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