Flag Ponds, Zone 23 (Miocene of the United States)

Where: Calvert County, Maryland (38.5° N, 76.5° W: paleocoordinates 38.6° N, 74.5° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Little Cove Point Member (St Marys Formation), Tortonian (11.6 - 7.2 Ma)

• Formerly Calvert Formation

• bed-level stratigraphic resolution

Environment/lithology: marine; claystone

• drab clay

Size class: macrofossils

Primary reference: G. B. Shattuck. 1904. Geological and paleontological relations, with a review of earlier investigations. Maryland Geological Survey Miocene Text xxxiii-clv [M. Uhen/M. Uhen]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 70850: authorized by Mark Uhen, entered by Mark Uhen on 09.04.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Gastropoda
 Cerithioidea - Turritellidae
"Turritella plebeia" = Mariacolpus plebeia
"Turritella plebeia" = Mariacolpus plebeia Say 1824 turret shell
subspecies plebeia
Bivalvia
 Hiatellida - Hiatellidae
Panopea sp.
Panopea sp. Menard 1807 clam
 Cardiida - Veneridae
Mercenaria sp., Dosinia sp.
Mercenaria sp. Schumacher 1817 quahog
Dosinia sp. Scopoli 1777 venus clam
 Cardiida - Cardiidae
Chesacardium sp.
Chesacardium sp. Ward 1992 cockle
 Pectinida - Pectinoidae
Chesapecten sp.
Chesapecten sp. Ward and Blackwelder 1975 scallop
 Ostreida - Malleidae
Isognomon (Hippochaeta) sp.