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Calvert Cliffs, Maryland
section near Calvert Cliffs State Park
close-up of a bed rich in molluscs

The foraminiferan tests and other microfossil remnants were extracted from sediment-material, which has been collected by Yasemin Tulu, John Nance and
together with S. Godfrey from the Calvert Marine Museum.

Epoch
Stage
Formation
Bed
Age (mya)
click on a bed or
 image to see more
Late Miocene
Tortonian
St. Marys
22-23
~8.8-10.2
more will follow
Middle Miocene
Serravallian
Choptank
19 up
~12.0-12.5
Bolivina sp.
Epistominella pontoni
Epistominella pontoni
Textularia sp.
Ostracode
"
Choptank
18
~12.7-13.1
more will follow
"
Choptank
17
~12.7-13.1
Bulimina elongata, Calvert Cliffs, Choptank Formation Bed 17
Cibicides floridanus, Calvert Cliffs, Choptank Formation Bed 17
Cibicides floridanus, Calvert Cliffs, Choptank Formation Bed 17
Uvigerina cf. calvertensis, Calvert Cliffs, Choptank Formation Bed 17
"
Calvert
16
~13.8-14.3
"
Langhian
Calvert
14
~13.8-14.3
"
"
Calvert
13
~14.7-15.2
Bulimina elongata
Florilus grateloupi
Florilus grateloupi
Globigerina sp.
Valvulineria floridana
"
Calvert
12
~14.7-15.2
more will follow
"
Calvert
11
~15.4-16.1
"
"
Calvert
10
~15.4-16.1
Florilus grateloupi
Globigerina sp.
Lagena sp.
Valvulineria floridana
Valvulineria floridana
Early Miocene
Burdigalian
Calvert
4-9
~16.8-17.5
Cribrononion sp.
Nonionella miocenica
Bulimina elongata
Spiroplectinella sp.
Coscinodiscus sp.
"
Calvert
3b
~17.6-18.2
more will follow


The images show findings of foraminiferan tests in samples (each 300-1200g) taken from the different beds of the Choptank and Calvert Formation at the indicated coordinates (see the single webpages per bed). This presentation does not imply any conclusion on biostratigrafic zonation. Statistical counts of the foraminifera-faunas or examination of the their spatial distribution and variation within each of the widespread and thick beds were not undertaken so far. The images may not even properly represent the content of each sample from a scientific point of view. Furthermore my My taxonomic suggestion isal suggestions have not been verified by a professional scientist so far. Michael, March 2009.