Station 2250 [Sunken Meadow Mbr, Yorktown Fm] (Pliocene of the United States)

Where: Gloucester County, Virginia (37.3° N, 76.6° W: paleocoordinates 37.3° N, 75.9° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Sunken Meadow Member (Yorktown Formation), Late/Upper Pliocene (3.6 - 2.6 Ma)

• STRATIGRAPHIC RELATIONS: From the Sunken Meadow Mbr of the Yorktown Fm, which unconformably overlies regionally the Eastover Fm (Late Miocene), and is unconformably overlain regionally by the Rushmore Mbr of the Yorktown Fm. AGE: Early Pliocene according to Ward (1993). STRATIGRAPHIC POSITION: From unknown position within the Sunken Meadow Mbr.

• bed-level stratigraphic resolution

Environment/lithology: coastal; siliciclastic sediments

• ENVIRONMENT: Not stated in text, but appears to be relatively shallow shelf depths.
• SPECIFIC LITHOLOGY: Unknown, probably siliciclastic. LITHIFICATION: Unknown.

Size class: macrofossils

Collected by Harris in 1890; reposited in the UNSM

Collection methods: surface (in situ),

• COLLECTOR: G.D. Harris, 1890. REPOSITORY: USNM.

Primary reference: L. W. Ward. 1993. The G.D Harris 1890 manuscript on the stratigraphy of Miocene and Pliocene beds at Yorktown, Virginia. Paleontological Research Institute Special Publication 20:1-118 [A. Hendy/A. Hendy]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 78273: authorized by Austin Hendy, entered by Austin Hendy on 31.01.2008

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Not exhaustive (as commented by Ward 1993, p. 3), but includes fairly comprehensive lists of characteristic gastropods and bivalves. NOMENCLATURE: Lists compiled by R. Arnold, based on identifications by Harris, with nomenclature subsequently revised by Ward to a modern standard, with species-resolution assignments.
Gastropoda
 Sorbeoconcha - Vermetidae
Serpulorbis granifera Say 1824 worm shell
 Neogastropoda - Muricidae
Ecphora quadricostata Conrad 1830 murex snail
 Neogastropoda - Melongenidae
Bivalvia
 Pectinida - Pectinoidae
Chesapecten jeffersonius Say 1824 scallop
 Ostreida - Ostreidae
Ostrea compressirostra Say 1824 oyster
 Arcida - Glycymerididae
 Carditida - Carditidae
Cyclocardia granulata Say 1824 clam
 Carditida - Crassatellidae
 Hiatellida - Hiatellidae
 Cardiida - Veneridae
 Cardiida - Cardiidae
Chesacardium acutilaqueatum Conrad 1839 cockle