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Choptank Formation, Bed 19 upper part, Calvert Cliffs, Maryland, USA     38.61 N 76.51 E       Serravallian, Middle Miocene
This bed is characterized by corroded and recrystallized tests. As a result a The classification is tends to be difficult or impossible. Nonetheless it was chosen to show the findings.

Bolivina 
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Buccella 
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Buccella 
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Buccella 
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Textularia 
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Other characteristic microfossils found in this bed:

Ostracode of an unknown species
Ostracode, Calvert Cliffs, USA