Type
Chron
Age range
139.54–138.66 Ma

International Timescale

Early Cretaceous
Berriasian

Geomagnetic Polarity Chron

M13
M14
M15
139.6139.5139.4139.4139.3139.3139.3139.2139.2139.1139.1139.0138.9138.9138.8138.8138.8138.7138.7

Macrostrat

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