Type
Subchron
Age range
137.94–137.8 Ma

International Timescale

Early Cretaceous
Berriasian

Geomagnetic Polarity Subchron

M12r.1n
M12r.2r
M12An
137.94137.93137.92137.91137.90137.89137.88137.87137.86137.85137.84137.83137.82137.81137.80

Macrostrat

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