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Intervals
Macrostrat
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C31n
1339
Type
Subchron
Age range
69.269–68.369
Ma
International Timescale
Late Cretaceous
Maastrichtian
Geomagnetic Polarity Subchron
C30r
C31n
C31r
69.3
69.3
69.2
69.2
69.1
69.0
69.0
69.0
68.9
68.8
68.8
68.8
68.7
68.7
68.6
68.5
68.5
68.5
68.4
68.3
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