Langley Core, VA - 6.49-6.55 m (Yorktown Fm): Late/Upper Pliocene, Virginia

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Cochliolepsis sp.
Scaphopoda - Dentaliida - Dentaliidae
Dentalium sp. Linnaeus 1758
Scaphopoda - Gadilida - Gadilidae
Cadulus sp. Philippi 1844
Gastropoda - Heterostropha - Pyramidellidae
Odostomia sp. Fleming 1817
Turbonilla sp. Risso 1826
Gastropoda - Opisthobranchia - Cylichnidae
Acteocina candei (d'Orbigny 1841)
Gastropoda - Turritellidae
Turritella alticostata Conrad 1834
recombined as Turritella (Turritella) alticostata
Gastropoda - Naticidae
Tectonatica pusilla (Say 1822)
Gastropoda - Neogastropoda - Nassariidae
? Nassarius sp. Duméril 1806
Gastropoda - Neogastropoda - Terebridae
? Terebra sp. Bruguière 1789
Gastropoda - Neogastropoda - Olividae
Olivella sp. Swainson 1831
Gastropoda - Eulimidae
Eulima dalli
Bivalvia - Nuculanida - Nuculanidae
Nuculana acuta (Conrad 1832)
Bivalvia - Nuculanida - Yoldiidae
Yoldia laevis (Say 1824)
Bivalvia - Nuculida - Nuculidae
Nucula proxima Say 1820
recombined as Nucula (Nucula) proxima
Bivalvia - Pectinida - Anomiidae
? Anomia sp. Linnaeus 1758
Bivalvia - Arcida - Glycymerididae
Glycymeris pectinata (Gmelin 1791)
recombined as Tucetona pectinata
Bivalvia - Cardiida - Tellinidae
Tellina sp. Linnaeus 1758
Bivalvia - Cardiida - Veneridae
Chione cancellata (Linnaeus 1767)
    = Chione cribraria Conrad 1843
Hendy et al. 2008
Pitar sayana (Conrad 1833)
synonym of Pitar morrhuanus
? Amiantis sp. Carpenter 1863
Bivalvia - Solenida - Solenidae
Solen sp. Linnaeus 1758
Bivalvia - Lucinida - Lucinidae
Parvilucina crenulata (Conrad 1840)
Bivalvia - Carditida - Crassatellidae
Eucrassatella sp. Iredale 1924
juvenile
Crassinella lunulata (Conrad 1834)
Bivalvia - Carditida - Carditidae
Pleuromeris sp. Conrad 1867
Bivalvia - Carditida - Astartidae
Astarte concentrica Conrad 1834
Astarte undulata Say 1824
recombined as Astarte (Ashtarotha) undulata
see common names

Geography
Country:United States State/province:Virginia County:Hampton
Coordinates: 37.1° North, 76.4° West (view map)
Paleocoordinates:37.1° North, 75.7° West
Basis of coordinate:stated in text
Geographic resolution:small collection
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
Local section:Langley Core Local bed:6.49 m
Local order:bottom to top
Regional section:Chesapeake Bay
Stratigraphic resolution:bed
Stratigraphy comments: SOURCE: collecton from 6.49-6.55 m (21.3-21.5 ft) in core. STRATIGRAPHIC RELATIONS: Overlies unconformably with a heavy burrowed contact, the Late Miocene Eastover Fm as 23.3 m (76.3 ft). The Yorktown is further overlain by 2.2. m (7.2 ft of Quaternary gravel and sand of the Lynn Haven Mr of the Tabb Fm. The Chown River and Bacons Castles Fm's are not recognized in the core. BIOSTRATIGRAPHY: NN 14-17 calcareous nannofossil zone and M5-M6 molluscan zone = Early-Late Pliocene. A Late Pliocene age is assigned as the collection is derived from the very top of the section, i.e. upper Yorktown Fm.
Lithology and environment
Primary lithology:shelly/skeletal unlithified silty,calcareous sandstone
Includes fossils?Y
Lithology description: GENERAL LITHOLOGY: Calcareous, muddy sand with abundant macrofossils.
Environment:coastal indet.
Geology comments: DEPTH: shallow, quiet water environment, possibly back-barrier or bay. SALINITY: no specific data reported, mostly taxa with normal marine preferences, but capable of living in opern bay system. THERMAL TOLERANCES: dinoflagellates suggest temperatures slightly warmer than at present. PALEOBIOGEOGRAPHY: no specific data reported.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection methods:core,field collection
Reason for describing collection:taxonomic analysis
Museum repositories:USNM
Collection method comments: SOURCE: occurrences of large recognizable species and any molluscan remains were noted. Fossiliferous samples were collected at selected intervals for precessing and further examination. Samples were washed, the fraction >850 um was retained, and molluscan fauna specimens recovered were sorted and identified. Generic assignments for extant groups were updated on the basis of Turgeon et al. (1998). COLLECTORS: Collected by NASA-USGS. REPOSITORIES: presumably reposited in USGS and USNM collections.
Taxonomic list comments:COVERAGE: Not exhaustive, but detailed considering limited material available from core. IDENTIFIED: presumably identified by L. Wingard (USGS). NOMENCLATURE: appears to be fairly modern.
Metadata
Also known as:21.3-21.5 ft
Database number:61293
Authorizer:A. Hendy Enterer:A. Hendy
Research group:marine invertebrate
Created:2006-06-04 15:44:13 Last modified:2013-11-25 13:37:23
Access level:the public Released:2006-06-04 15:44:12
Creative Commons license:CC BY
Reference information

Primary reference:
17631. L. E. Edwards, J. A. Barron, D. Bukry, L.M. Bybell, T.M. Cronin, C.W. Poag, R.E. Weems and G.L. Wingard. 2005. Paleontology of the Upper Eocene to Quaternary Post Impact Section in the USGS-NASA Langley Core, Hampton Virginia. United States Geological Survey Professional Paper 1688:1-71 [A. Miller/A. Hendy/R. McClees-Funinan]

Secondary references:

19909 A. J. W. Hendy, D. P. Buick, K. V. Bulinski, C. A. Ferguson, and A. I. Miller. 2008. Unpublished census data from Atlantic coastal plain and circum-Caribbean Neogene assemblages and taxonomic opinions. [A. Hendy/A. Hendy/A. Hendy]