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Intervals
Macrostrat
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NN2
297
Type
Zone
Age range
22.68–19.18
Ma
International Timescale
Miocene
Burdigalian
Aquitanian
Calcareous Nannoplankton Zones
NN3
NN2
NN1
22.8
22.6
22.4
22.2
22.0
21.8
21.6
21.4
21.2
21.0
20.8
20.6
20.4
20.2
20.0
19.8
19.6
19.4
19.2
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