Type
Subchron
Age range
164.24–164.15 Ma

International Timescale

Middle Jurassic
Callovian

Geomagnetic Polarity Subchron

M38n.2n
M38n.2r
M38n.3n
164.24164.24164.23164.22164.22164.22164.21164.21164.20164.19164.19164.19164.18164.18164.17164.16164.16164.16164.15

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