Type
Subchron
Age range
163.65–163.53 Ma

International Timescale

Middle Jurassic
Callovian

Geomagnetic Polarity Subchron

M37n.1n
M37n.1r
M37n.2n
163.66163.65163.65163.64163.63163.63163.63163.62163.62163.61163.60163.60163.59163.59163.59163.58163.57163.57163.56163.56163.56163.55163.54163.54163.53163.53163.53

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