Station 2250 [Cobham Bay Mbr, Eastover Fm] (Miocene of the United States)

Where: Gloucester County, Virginia (37.3° N, 76.6° W: paleocoordinates 37.4° N, 74.8° W)

• coordinate stated in text

• outcrop-level geographic resolution

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

• STRATIGRAPHIC RELATIONS: Probably from the Cobham Bay Mbr of the Eastover Fm, which unconformably overlies units of the Chesapeake Gp (Miocene), and is unconformably overlain regionally by the Sunken Meadow Mbr of the Yorktown Fm. AGE: Late Miocene. STRATIGRAPHIC POSITION: From unknown position within the Cobham Bay 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 78274: 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.
 Carditida - Astartidae
Astarte rappahannockensis Gardner 1943 clam
 Arcida - Arcidae
Striarca centenaria Say 1824 clam
 Ostreida - Malleidae
Dallarca carolinensis