Johnson Point - Sample 1 (James City Fm) (Pleistocene of the United States)

Where: Craven County, North Carolina (35.0° N, 77.0° W: paleocoordinates 35.1° N, 76.5° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: James City Formation, Early/Lower Pleistocene (2.6 - 0.8 Ma)

• Basinal/regional section name: Neuse River.

•Sample 1 collected from ~0.5 m above the base of the section and ~0.2 m below Sample 2. James City Fm was regarded as Pliocene by DuBar and Solliday (1963), though more recent biostratigraphy indicates an Early Pleistocene age (DuBar et al. 1974, Blackwelder 1981, McCartan et al. 1982). The James City Fm is considered time equivalent or slightly younger than the Waccamaw Fm of N. and S. Carolina., and with the Caloosahatchee Fm of Florida. Cronin et a. (1984) proposed an age of 1.3-0.7 Ma for the formation.

• bed-level stratigraphic resolution

Environment/lithology: estuary or bay; unlithified, shelly/skeletal, gray, blue, sandy mudstone

• Shallow subtropical marine bay having fairly open communication with the ocean.
• Medium bluish gray to olive gray, slightly indurated, shelly sandy mudstone to siltstone containing shelly interbeds (presumably sampled).

Size class: macrofossils

Preservation: original aragonite, original calcite

Collection methods: bulk,

• Counts are specimen tallies corrected to estimate numbers of individual organisms (e.g. for bivalves 1 beak fragment = 1/2 individual). Because of moder of preservation (e.g. dismembered zoaria of fragile bryozoans), abundance of certain organisms given as: A, abundant; C, common; R, rare. Repository unknown, possibly at Humboldt State University.

Primary reference: W. Miller. 1990. Checklist of megafossils from the James City Formation (Lower Pleistocene) at Johnson Point, Craven County, North Carolina. Tulane Studies in Geology and Paleontology 22:93-100 [A. Miller/A. Hendy]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 60986: authorized by Austin Hendy, entered by Austin Hendy on 28.05.2006

Creative Commons license: CC BY (attribution)

Taxonomic list

• Exhaustive for bulk samples, which should be very representative given that they have sample sizes in excess of 1-2,000 specimens. Nomenclature modern.
unclassified
  -
Gymnolaemata
 Cheilostomata - Electridae
Electra sp. Lamouroux 1816
 Cheilostomata - Cribrilinidae
 Cheilostomata - Bryocryptellidae
 Cheilostomata - Lepraliellidae
 Cheilostomata - Bitectiporidae
Polychaeta
 Serpulimorpha -
 Spionida - Spionidae
Polydora sp. Bosk 1801
Gastropoda
 Heterostropha - Pyramidellidae
Boonea impressa Say 1822 snail
Boonea seminuda Adams 1839 snail
Odostomia sp. Fleming 1817 snail
Turbonilla (Pyrgiscus) "sp. B" Philippi 1841 snail
 Opisthobranchia - Cylichnidae
Acteocina candei d'Orbigny 1841 barrel-bubble
 Neotaenioglossa - Calyptraeidae
Crepidula fornicata Linnaeus 1758 slipper shell
Crepidula plana Say 1822 slipper shell
Crepidula convexa Say 1822 slipper shell
 Epitonioidea - Epitoniidae
 Sorbeoconcha - Cerithiopsidae
"Seila adamsi" = Seila adamsii
"Seila adamsi" = Seila adamsii Lea 1845 snail
 Neogastropoda - Columbellidae
Anachis sp., "Anachis lafresnayi" = Cotonopsis (Cotonopsis) lafresnayi, "Mitrella lunata" = Astyris lunata, "Anachis obesa" = Parvanachis obesa
Anachis sp. Adams and Adams 1853 snail
"Anachis lafresnayi" = Cotonopsis (Cotonopsis) lafresnayi Fischer and Bernardi 1857 snail
"Mitrella lunata" = Astyris lunata Say 1826 snail
"Anachis obesa" = Parvanachis obesa Adams 1845 snail
 Neogastropoda - Nassariidae
"Nassarius albus" = Nassarius antillarum
"Nassarius albus" = Nassarius antillarum d'Orbigny 1847 snail
 Neogastropoda - Melongenidae
Busycon sp. Röding 1798 whelk
 Neogastropoda - Marginellidae
Prunum sp. Swainson 1840 margin shell
 Neogastropoda - Muricidae
Urosalpinx cinerea Say 1822 murex snail
 Vanikoroidea - Eulimidae
Melanella conoidea Kurtz and Stimpson 1851 snail
Bivalvia
 Nuculanida - Nuculanidae
Nuculana acuta Conrad 1832 pointed nut clam
 Nuculanida - Yoldiidae
 Nuculida - Nuculidae
"Nucula proxima" = Nucula (Nucula) proxima
"Nucula proxima" = Nucula (Nucula) proxima Say 1820 Atlantic Nut Clam
 Pectinida - Pectinoidae
"Argopecten eboreus" = Carolinapecten eboreus
"Argopecten eboreus" = Carolinapecten eboreus Conrad 1833 scallop
 Ostreida - Ostreidae
"Ostrea sculpturata" = Conradostrea sculpturata
"Ostrea sculpturata" = Conradostrea sculpturata Conrad 1840 oyster
 Arcida - Arcidae
Anadara aequicostata Conrad 1845 ark
 Cardiida - Sportellidae
 Cardiida - Semelidae
Abra aequalis Say 1822 abra
Cumingia tellinoides Conrad 1831 clam
 Cardiida - Veneridae
Mercenaria permagna Conrad 1838 quahog
 Cardiida - Mactridae
Mulinia lateralis Say 1822 clam
 Pholadida - Myidae
Sphenia sp. Turton 1822 softshell clam
Polyplacophora
 Neoloricata - Chaetopleuridae
Chaetopleura sp. Shuttleworth 1853 chiton
Malacostraca
 Decapoda -
Brachyura sp. Latreille 1802 crab
Thecostraca
 Balanomorpha - Balanidae
Balanus sp. Da Costa 1778 barnacle
Anthozoa
 Scleractinia - Rhizangiidae
Septastrea sp. d'Orbigny 1849 stony coral
Demospongiae
 Clavulina - Clionaidae
? Cliona sp. demosponge