Lexicon
Intervals
Macrostrat

M12r.1n

1296

Type

Subchron

Age range

137.8–137.73 Ma

International Timescale

Early Cretaceous

Berriasian

Geomagnetic Polarity Subchron

M12r.1r

M12r.1n

M12r.2r

Macrostrat

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