Lexicon
Intervals
Macrostrat
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NN19
280
Type
Zone
Age range
1.93–0.43
Ma
International Timescale
Pleistocene
Chibanian
Calabrian
Gelasian
Calcareous Nannoplankton Zones
NN20
NN19
NN18
1.9
1.8
1.7
1.6
1.5
1.4
1.3
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
0.4
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