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M39n.4r
1177
Type
Subchron
Age range
166.41–166.31
Ma
International Timescale
Middle Jurassic
Bathonian
Geomagnetic Polarity Subchron
M39n.4n
M39n.4r
M39n.5n
166.41
166.41
166.40
166.40
166.39
166.38
166.38
166.38
166.37
166.37
166.36
166.35
166.35
166.34
166.34
166.34
166.33
166.32
166.32
166.31
166.31
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