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Intervals
Macrostrat
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NP11
312
Type
Zone
Age range
54.09–52.93
Ma
International Timescale
Eocene
Ypresian
Calcareous Nannoplankton Zones
NP12
NP11
NP10
54.1
54.0
54.0
54.0
53.9
53.9
53.8
53.8
53.7
53.6
53.6
53.5
53.5
53.5
53.4
53.4
53.3
53.3
53.2
53.1
53.1
53.0
53.0
53.0
52.9
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