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Intervals
Macrostrat
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M20
1071
Type
Chron
Age range
148.44–146.54
Ma
International Timescale
Late Jurassic
Tithonian
Geomagnetic Polarity Chron
M19
M20
M21
148.5
148.4
148.3
148.2
148.1
148.0
147.9
147.8
147.7
147.6
147.5
147.4
147.3
147.2
147.1
147.0
146.9
146.8
146.7
146.6
146.5
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