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Intervals
Macrostrat
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NP17
306
Type
Zone
Age range
39.23–36.94
Ma
International Timescale
Eocene
Priabonian
Bartonian
Calcareous Nannoplankton Zones
NP19-20
NP18
NP17
NP16
39.3
39.2
39.1
39.0
38.9
38.8
38.7
38.6
38.5
38.4
38.3
38.2
38.1
38.0
37.9
37.8
37.7
37.6
37.5
37.4
37.3
37.2
37.1
37.0
36.9
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