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Intervals
Macrostrat
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M39
1048
Type
Chron
Age range
166.72–165.04
Ma
International Timescale
Middle Jurassic
Callovian
Bathonian
Geomagnetic Polarity Chron
M38
M39
M40
166.7
166.6
166.5
166.4
166.3
166.2
166.1
166.0
165.9
165.8
165.7
165.6
165.5
165.4
165.3
165.2
165.1
165.0
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