Type
Chron
Age range
138.66–138.25 Ma

International Timescale

Early Cretaceous
Berriasian

Geomagnetic Polarity Chron

M12A
M13
M14
138.66138.64138.62138.60138.58138.56138.54138.52138.50138.48138.46138.44138.42138.40138.38138.36138.34138.32138.30138.28138.26138.24

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