Norfolk and Western Railroad, borrow pit (Pleistocene of the United States)

Where: Nansemond County, Virginia (36.8° N, 76.4° W: paleocoordinates 36.8° N, 76.2° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: silty-sand facies Member (Norfolk Formation), Pleistocene (2.6 - 0.0 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: estuary or bay; unlithified, pebbly, silty sandstone and siltstone

• composed of fairly uniform silty sand and sandy silt. sometimes thick and fills channels cut into underlying formation where it is coarse sand and pea-gravel overlain by organic sands, silts, and woody peats, which grade upward into fossiliferous silty sands.

Primary reference: N. K. Coch. 1971. Geology of the Newport News South and Bowers Hill quadrangles, Virginia. Virginia Division of Mineral Resources Report of Investigations 28:1-26 [J. Alroy/M. Sommers/M. Uhen]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 7109: authorized by John Alroy, entered by Mike Sommers on 25.04.2000

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Gastropoda
 Neotaenioglossa - Calyptraeidae
Crepidula convexa
Crepidula convexa Say 1822 slipper shell
 Sorbeoconcha - Naticidae
"Polinices duplicatus" = Neverita duplicatus
"Polinices duplicatus" = Neverita duplicatus Say 1822 moon snail
 Neogastropoda - Melongenidae
Busycon carica, "Busycon canaliculatum" = Busycotypus canaliculatus
Busycon carica Gmelin 1792 whelk
"Busycon canaliculatum" = Busycotypus canaliculatus Linnaeus 1758 whelk
 Neogastropoda - Nassariidae
"Nassarius trivittatus" = Ilyanassa trivittata, "Nassarius obsoletus" = Ilyanassa obsoleta
"Nassarius trivittatus" = Ilyanassa trivittata Say 1822 snail
"Nassarius obsoletus" = Ilyanassa obsoleta Say 1822 snail
 Neogastropoda - Muricidae
Eupleura caudata
Eupleura caudata Say 1822 murex snail
Bivalvia
 Nuculanida - Nuculanidae
Nuculana acuta
Nuculana acuta Conrad 1832 pointed nut clam
 Cardiida - Veneridae
"Pitar morrhuanna" = Pitar morrhuanus, Mercenaria mercenaria
"Pitar morrhuanna" = Pitar morrhuanus Dall 1902 venus clam
Mercenaria mercenaria Linnaeus 1758 quahog
 Pholadida - Corbulidae
"Corbula contracta" = Caryocorbula contracta
"Corbula contracta" = Caryocorbula contracta Say 1822 clam
 Arcida - Arcidae
"Anadara transversa" = Anadara (Larkinia) transversa
"Anadara transversa" = Anadara (Larkinia) transversa Say 1822 ark