Type
Subchron
Age range
138.17–137.94 Ma

International Timescale

Early Cretaceous
Berriasian

Geomagnetic Polarity Subchron

M12r.2r
M12An
M12Ar
138.18138.17138.16138.15138.14138.13138.12138.11138.10138.09138.08138.07138.06138.05138.04138.03138.02138.01138.00137.99137.98137.97137.96137.95137.94137.93

Macrostrat

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