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M. lehneri PRZ
1534
Type
Zone
Age range
42.3–40.5
Ma
International Timescale
Eocene
Bartonian
Lutetian
Planktic Foraminiferal Primary Biozones
O. beckmanni TRZ
M. lehneri PRZ
A. topilensis PRZ
42.3
42.2
42.1
42.0
41.9
41.8
41.7
41.6
41.5
41.4
41.3
41.2
41.1
41.0
40.9
40.8
40.7
40.6
40.5
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