Type
Subchron
Age range
165.13–165.04 Ma

International Timescale

Middle Jurassic
Callovian

Geomagnetic Polarity Subchron

M38r
M39n.1n
M39n.1r
165.13165.13165.12165.12165.11165.10165.10165.09165.09165.09165.08165.07165.07165.06165.06165.06165.05165.04165.04

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