Mount Pleasant, Zone 26 (Miocene of the United States)

Where: Surry County, Virginia (37.2° N, 76.8° W: paleocoordinates 37.3° N, 75.5° W)

• coordinate estimated from map

When: Cobham Bay Member (Eastover Formation), Messinian (7.2 - 5.3 Ma)

• Mollusk Zone 7

Environment/lithology: marine; gray, green, argillaceous, silty sandstone

• sand; very fine, well-sorted, grayish yellow, very shelly

Primary reference: L. W. Ward. 1992. Molluscan biostratigraphy of the Miocene Middle Atlantic Coastal Plain of North America. Virginia Museum of Natural History 2 [A. Miller/A. Hendy]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 71623: authorized by Mark Uhen, entered by Mark Uhen on 02.05.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

 Neogastropoda - Muricidae
Ecphora kochi Ward and Gilinsky 1988 murex snail
 Cerithioidea - Turritellidae
"Turritella plebeia" = Mariacolpus plebeia
"Turritella plebeia" = Mariacolpus plebeia Say 1824 turret shell
subspecies plebeia
 Arcida - Glycymerididae
Costaglycymeris mixoni Ward 1992 clam
 Arcida - Arcidae
Rasia arata Say 1824 ark
 Ostreida - Ostreidae
Ostrea compressirostra Say 1824 oyster
subspecies geraldjohnsoni
 Ostreida - Malleidae
 Pectinida - Pectinoidae
Chesapecten middlesexensis Mansfield 1936 scallop
subspecies middlesexensis
Placopecten princepoides Emmons 1858 scallop
Carolinapecten urbannaensis Mansfield 1928 scallop
 Lucinida - Lucinidae
Stewartia anodonta Say 1824 clam
 Cardiida - Euloxidae
 Cardiida - Glossidae
Glossus fraterna Say 1824 clam
 Cardiida - Veneridae
Mercenaria druidi Ward 1992 quahog
Lirophora vredenburgi Ward 1992 venus clam
 Carditida - Crassatellidae
 Carditida - Astartidae
Astarte cobhamensis Ward 1992 clam
Astarte rappahannockensis Gardner 1943 clam
Dallarca carolinensis
Dallarca carolinensis Conrad 1849
subspecies carolinensis