Molluscan Zone 5, Rushmere Mbr, Yorktown Fm - Sunken Meadow Creek: Late/Upper Pliocene, Virginia

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Bivalvia - Ostreida - Ostreidae
Conradostrea sculpturata (Conrad 1840)
Ostrea compressirostra Say 1824
Subspecies: O. compressirostra raveneli
Bivalvia - Pectinida - Pectinidae
Chesapecten madisonius (Say 1824)
see common names

Geography
Country:United States State/province:Virginia County:Surry
Coordinates: 37.2° North, 76.9° West (view map)
Paleocoordinates:37.3° North, 76.3° West
Basis of coordinate:based on nearby landmark
Geographic resolution:outcrop
Time
Period:Neogene Epoch:Pliocene
Stage:Piacenzian 10 m.y. bin:Cenozoic 6
Key time interval:Late/Upper Pliocene
Age range of interval:3.60000 - 2.58000 m.y. ago
Stratigraphy
Formation:Yorktown Member:Rushmere
Stratigraphic resolution:bed
Stratigraphy comments: Unit D in Ward 1992 (Fig. 11), ~2.0 m of sand. Collection from Rushmere Mbr of Yorktown Fm, which overlies a 2 m thick unit of Sunken Meadow Mbr, Eastover Fm and underlies Pleistocene sand gravel.
Lithology and environment
Primary lithology:shelly/skeletal unlithified sandstone
Includes fossils?Y
Lithology description: Sand, shelly, fine, slighly phosphatic.
Environment:coastal indet.
Geology comments: No geologic or environmental data provided in text. Presumably accumulated during a successive transgression following post Eastover Fm regression. Appears to contain a normal marine fauna although of low diversity.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection methods:field collection,survey of museum collection
Reason for describing collection:biostratigraphic analysis
Museum repositories:USNM
Collection method comments: Most material appears to be reposited in USNM and USGS collections
Taxonomic list comments:Probably not exhaustive, but a summary of the common and abundant forms from unit. Modern nomenclature utilized with species level assignments.
Metadata
Database number:59298
Authorizer:A. Hendy Enterer:A. Hendy
Modifier:G. Varnham Research group:marine invertebrate
Created:2006-03-25 11:56:09 Last modified:2022-05-12 04:48:16
Access level:the public Released:2006-03-25 11:56:09
Creative Commons license:CC BY
Reference information

Primary reference:
16985. 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]