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Intervals
Macrostrat
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M42r
1153
Type
Subchron
Age range
169.24–169.11
Ma
International Timescale
Middle Jurassic
Bajocian
Geomagnetic Polarity Subchron
M42n.4n
M42r
M43.1n
169.24
169.23
169.22
169.21
169.20
169.19
169.18
169.17
169.16
169.15
169.14
169.13
169.12
169.11
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