Molluscan Zone 8, Claremont Manor Mbr, Eastover Fm - Sunken Meadow Creek (Miocene of the United States)

Where: Surry County, Virginia (37.2° N, 76.9° W: paleocoordinates 37.4° N, 75.2° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Claremont Manor Member (Eastover Formation), Late/Upper Miocene (11.6 - 5.3 Ma)

• Unit A in Ward 1992 (Fig. 11), ~8m of sand. Collection from Claremont Mbr of Eastover Fm, which underlies a thin unit of the Cobham Bay Mbr, Eastover Fm and the Sunken Meadow Mbr of the Yorktown Fm.

• bed-level stratigraphic resolution

Environment/lithology: coastal; unlithified, silty sandstone

• Accumulated during transgression; inner bay conditions becoming more open shelf in nature towards top of unit.
• Sand, silty, porrly sorted.

Size class: macrofossils

Reposited in the USNM

• Most material appears to be reposited in USNM and USGS collections

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: biostratigraphic analysis

PaleoDB collection 59295: authorized by Austin Hendy, entered by Austin Hendy on 25.03.2006

Creative Commons license: CC BY (attribution)

Taxonomic list

• Probably not exhaustive, but a summary of the common and abundant forms from unit. Modern nomenclature utilized with species level assignments.
Gastropoda
 Cerithioidea - Turritellidae
"Turritella plebeia" = Mariacolpus plebeia
"Turritella plebeia" = Mariacolpus plebeia Say 1824 turret shell
Subspecies: Turritella plebeia carinata
 Neogastropoda - Muricidae
Ecphora gardnerae Wilson 1987 murex snail
Subspecies: E. gardnerae whiteoakensis
Bivalvia
 Hiatellida - Hiatellidae
Panopea goldfussii Wagner 1839 clam
 Cardiida - Euloxidae
 Cardiida - Glossidae
 Cardiida - Veneridae
Mercenaria druidi Ward 1992 quahog
Lirophora dalli Olsson 1914 venus clam
 Lucinida - Lucinidae
Lucinoma contracta Say 1824 clam
 Carditida - Crassatellidae
Marvacrassatella surryensis Mansfield 1929 clam
 Pectinida - Pectinoidae
Chesapecten middlesexensis Mansfield 1936 scallop
Subspecies: Chesapecten middlesexensis ceccae
 Ostreida - Malleidae
 Ostreida - Ostreidae
Ostrea compressirostra Say 1824 oyster
Subspecies: Ostrea compressirostra brucei
 Arcida - Arcidae
Dallarca virginiae Wagner 1850 clam
 Arcida - Glycymerididae
Costaglycymeris virginiae Wagner 1848 clam
Dallarca carolinensis
  -
Dallarca carolinensis Conrad 1849
Includes both D. carolinensis clisea and D. carolinensis rotunda