Pamunkey River - at Horseshoe (Eocene of the United States)

Also known as USGS Locality 26412

Where: Hanover County, Virginia (37.7° N, 77.1° W: paleocoordinates 37.6° N, 66.0° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Piney Point Formation (Pamunkey Group), Middle Eocene (47.8 - 37.7 Ma)

• 15 feet thick

• bed-level stratigraphic resolution

Environment/lithology: coastal; unlithified, fine-grained, glauconitic, gray, green, argillaceous sandstone

• Sand, olive-gray (5 Y 4/1), clayey, very glauconitic, very calcareous owing to shell fragments and microfossils

Size classes: macrofossils, microfossils

Preservation: mold/impression

Reposited in the USGS

Primary reference: L. W. Ward. 1985. Stratigraphy and Characteristic Mollusks of the Pamunkey Group (Lower Tertiary) and the Old Church Formation of the Chesapeake Group-Virginia Coastal Plain. United States Geological Survey Professional Paper (1346)1-77 [A. Miller/D. Buick]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 60664: authorized by Arnold Miller, entered by Devin Buick on 19.05.2006, edited by Austin Hendy

Creative Commons license: CC BY (attribution)

Taxonomic list

Gastropoda
 Cerithioidea - Turritellidae
Turritella nasuta turret shell
Bivalvia
 Nuculanida - Nuculanidae
"Leda semen" = Calorhadia semen, "Leda coelatella" = Nuculana
"Leda semen" = Calorhadia semen Lea 1883 pointed nut clam
"Leda coelatella" = Nuculana pointed nut clam
 Pholadida - Corbulidae
 Pectinida - Plicatulidae
Plicatula filamentosa Conrad 1833 scallop
 Pectinida - Anomiidae
Anomia lisbonensis Aldrich 1886 jingle
 Ostreida - Ostreidae
Cubitostrea sellaeformis Conrad 1832 oyster
 Arcida - Glycymerididae
Glycymeris lisbonensis Harris 1919 clam