Type
Subchron
Age range
137.73–137.06 Ma

International Timescale

Early Cretaceous
Valanginian
Berriasian

Geomagnetic Polarity Subchron

M12n
M12r.1r
M12r.1n
137.8137.7137.7137.6137.6137.5137.4137.4137.3137.3137.3137.2137.2137.1137.1

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