Langley Core, VA - 66.78-66.84 m (Eastover Fm) (Miocene of the United States)

Also known as 219.1-219.3 ft

Where: Hampton County, Virginia (37.1° N, 76.4° W: paleocoordinates 37.3° N, 73.3° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Eastover Formation, Miocene (23.0 - 5.3 Ma)

• SOURCE: collecton from 66.78-66.84 m (219.1-219.3 ft) in core. STRATIGRAPHIC RELATIONS: Overlies the St Mary's Fm (early Late Miocene), and in turn is overlain by the Yorktown Fm. Both contacts are unconformable. The height of contact between Pliocene Yorktown Fm and the Eastover Fm is 23.3 m (76.3 ft). BIOSTRATIGRAPHY: NN 11 calcareous nannofossil zone, D9-D10 dinoflagellate zone and M7-M8 molluscan zone.

• bed-level stratigraphic resolution

Environment/lithology: coastal; unlithified, shelly/skeletal, argillaceous, silty, sandy sandstone

• DEPTH: relatively shallow, marine shelf with diverse substrates. SALINITY: no specific data reported, apparently normal marine conditions. THERMAL TOLERANCES: subtropical-warm-temperate. PAELOBIOGEOGRAPHY: no specific data reported.
• GENERAL LITHOLOGY: Shelly, sandy basal lag and consists of clayey, silty sands.

Size class: macrofossils

Reposited in the USNM

Collection methods: core,

• 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.

Primary reference: 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]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 61276: authorized by Austin Hendy, entered by Austin Hendy on 04.06.2006

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Not exhaustive, but detailed considering limited material available from core. IDENTIFIED: presumably identified by L. Wingard (USGS). NOMENCLATURE: appears to be fairly modern.
Scaphopoda
 Dentaliida - Dentaliidae
Dentalium sp. Linnaeus 1758 tusk shell
Bivalvia
 Pectinida - Pectinoidae
Pectinidae indet. Wilkes 1810 scallop
 Pectinida - Anomiidae
? Anomia sp. Linnaeus 1758 jingle
 Lucinida - Lucinidae
Parvilucina crenulata Conrad 1840 clam
 Pholadida - Myidae
Mya ? wilsoni Ward 1992 softshell clam
 Cardiida - Tellinidae
Tellina sp. Linnaeus 1758 tellin clam
 Cardiida - Veneridae
Dosinia sp. Scopoli 1777 venus clam
Mercenaria sp. Schumacher 1817 quahog
 Nuculida - Nuculidae
"Nucula proxima" = Nucula (Nucula) proxima
"Nucula proxima" = Nucula (Nucula) proxima Say 1820 Atlantic Nut Clam
Gastropoda
 Neogastropoda - Columbellidae
"Mitrella communis" = Astyris communis
"Mitrella communis" = Astyris communis Conrad 1862 snail
 Neogastropoda - Buccinidae
"Scalaspira" strumosa Conrad 1832 true whelk
 Neogastropoda - Nassariidae
Nassarius sp. Duméril 1806 snail
Nassarius peralta Conrad 1868 snail
 Neogastropoda - Muricidae
Eupleura caudata Say 1822 murex snail
Ecphora gardnerae Wilson 1987 murex snail
Subspecies: E. gardnerae whiteoakensis
 Sorbeoconcha - Naticidae
"Lunatia heros" = Euspira heros
"Lunatia heros" = Euspira heros Say 1822 moon snail
 Cerithioidea - Turritellidae
"Turritella plebeia" = Mariacolpus plebeia
"Turritella plebeia" = Mariacolpus plebeia Say 1824 turret shell
 Heterostropha - Pyramidellidae
Turbonilla sp. Risso 1826 snail