Type
Subchron
Age range
138.25–138.17 Ma

International Timescale

Early Cretaceous
Berriasian

Geomagnetic Polarity Subchron

M12An
M12Ar
M13n
138.25138.25138.24138.24138.23138.22138.22138.22138.21138.21138.20138.19138.19138.19138.18138.18138.17

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