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Macrostrat
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M. formosa LOZ
1527
Type
Zone
Age range
54–52.3
Ma
International Timescale
Eocene
Ypresian
Planktic Foraminiferal Primary Biozones
M. aragonensis/M. subbotinae CRZ
M. formosa LOZ
M. marginodentata PRZ
54.0
53.9
53.8
53.7
53.6
53.5
53.4
53.3
53.2
53.1
53.0
52.9
52.8
52.7
52.6
52.5
52.4
52.3
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