Type
Subchron
Age range
164.86–164.78 Ma

International Timescale

Middle Jurassic
Callovian

Geomagnetic Polarity Subchron

M28n.4r
M38n.5n
M38r
164.86164.85164.85164.84164.84164.84164.83164.82164.82164.81164.81164.81164.80164.79164.79164.78164.78

Macrostrat

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