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Intervals
Macrostrat
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M38
1049
Type
Chron
Age range
165.04–163.88
Ma
International Timescale
Middle Jurassic
Callovian
Geomagnetic Polarity Chron
M37
M38
M39
165.1
165.0
164.9
164.9
164.8
164.8
164.8
164.7
164.7
164.6
164.6
164.5
164.4
164.4
164.3
164.3
164.3
164.2
164.2
164.1
164.1
164.0
163.9
163.9
163.8
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