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P. naguewichiensis HOZ
1540
Type
Zone
Age range
33.8–32
Ma
International Timescale
Oligocene
Rupelian
Planktic Foraminiferal Primary Biozones
T. ampliapertura HOZ
P. naguewichiensis HOZ
H. alabamensis HOZ
Planktic Foraminiferal Secondary Biozones
T. ampliapertura HOZ
P. naguewichiensis HOZ
H. alabamensis HOZ
33.8
33.7
33.6
33.5
33.4
33.3
33.2
33.1
33.0
32.9
32.8
32.7
32.6
32.5
32.4
32.3
32.2
32.1
32.0
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