Type
Subchron
Age range
165.04–164.86 Ma

International Timescale

Middle Jurassic
Callovian

Geomagnetic Polarity Subchron

M38n.5n
M38r
M39n.1n
165.04165.03165.02165.01165.00164.99164.98164.97164.96164.95164.94164.93164.92164.91164.90164.89164.88164.87164.86

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