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Calvert Formation Bed 13 at Warriors Rest Calvert Cliffs, Maryland, USA     38.61 N 76.51 E       Langhian, Middle Miocene

Bolivina cf. marginata
juvenile Bulimina elongata
juvenile Bulimina elongata
Florilus chesapeakensis
Bolivina cf. marginata
Bulimina elongata
Bulimina elongata
Globigerina sp.
Florilus grateloupi
Florilus grateloupi
Florilus grateloupi
Florilus grateloupi
Florilus grateloupi
Florilus grateloupi
Florilus grateloupi
Florilus grateloupi
Globigerina sp.
Vavulineria floridana
Globigerina sp.
Vavulineria floridana

Other characteristic microfossils found in this bed:

Coscinodiscus sp.
Diatom image of specimen found in Bed 4-9
specimen in Bed 13 look alike
Coscinodiscus sp.