Station 2250 [Rushmere 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: Rushmere Member (Yorktown Formation), Late/Upper Pliocene (3.6 - 2.6 Ma)

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


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 78272: 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.
 Cerithioidea - Turritellidae
"Turritella alticostata" = Turritella (Turritella) alticostata
"Turritella alticostata" = Turritella (Turritella) alticostata Conrad 1834 turret shell
 Sorbeoconcha - Vermetidae
Serpulorbis granifera Say 1824 worm shell
 Neogastropoda - Muricidae
Ecphora quadricostata Conrad 1830 murex snail
"Trophon tetricus" = Boreotrophon tetricus Conrad 1832 murex snail
 Neogastropoda - Fasciolariidae
 Neogastropoda - Melongenidae
 Lepetellida - Fissurellidae
Diodora redimicula Say 1824 snail
 Pectinida - Pectinoidae
Chesapecten madisonius Say 1824 scallop
 Ostreida - Ostreidae
Conradostrea sculpturata Conrad 1840 oyster
 Arcida - Noetiidae
Noetia incile Say 1824 clam
 Arcida - Arcidae
"Sectiarca lienosa" = Anadara (Sectiarca) ark
Striarca centenaria Say 1824 clam
 Carditida - Carditidae
Cyclocardia granulata Say 1824 clam
Carditamera arata Conrad 1832 clam
 Carditida - Astartidae
"Astarte undulata" = Astarte (Ashtarotha) undulata Say 1824 clam
Astarte concentrica Conrad 1834 clam
 Carditida - Crassatellidae
 Hiatellida - Hiatellidae
 Cardiida - Veneridae
"Mercenaria tridacnoides" = Mercenaria campechiensis tridacnoides Lamarck 1818 quahog
 Cardiida - Chamidae
Chama congregata Conrad 1833 jewel box
 Cardiida - Cardiidae
Chesacardium acutilaqueatum Conrad 1839 cockle
[entered as Chesacardium aculaqueatum]