Claiborne Bluff 2 (Gosport Sand, AL) (Eocene of the United States)

Where: Monroe County, Alabama (31.5° N, 87.5° W: paleocoordinates 32.1° N, 78.7° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Gosport Sand Formation (Claiborne Group), Bartonian (41.3 - 38.0 Ma)

• "At each site, the horizon sampled was in the lower third of the exposure, approx. 2m above the base of the formation, but stratigraphic equivalence is undetermined."

• bed-level stratigraphic resolution

Environment/lithology: marine; unlithified, glauconitic, shelly/skeletal, calcareous sandstone and shale

• the gosport sand is a deposit of early late eocene (bartonian) age, and consists of 2-10m of extremely fossiliferous, unconsolidated, glauconitic, calcareous quartz sand, with occasional indurated ledges and thin lenses of carbonaceous shale and lignite.

Size class: mesofossils

Collection methods: bulk, mechanical, sieve,

• "Numbers of specimens reflect number of identifiable gastropod apices and total number of bivalve umbos; unidentifiable fragments were not counted."

Primary reference: E. A. CoBabe and W. D. Allmon. 1994. Effects of sampling on paleoecologic and taphonomic analyses in high-diversity fossil accumulations: an example from the Eocene Gosport Sand, Alabama. Lethaia 27:167-178 [A. Miller/K. Layou/P. Wagner]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 5321: authorized by Arnold Miller, entered by Karen Layou on 23.09.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Nuculanida - Nuculanidae
"Nuculana coelata" = Leda coelata
"Nuculana coelata" = Leda coelata Hinds 1843 pointed nut clam
 Nuculida - Nuculidae
"Nucula ovula" = Nucula (Nucula) ovula
"Nucula ovula" = Nucula (Nucula) ovula Lea 1833 nut clam
 Ostreida - Gryphaeidae
"Pycnodonta sp." = Pycnodonte
"Pycnodonta sp." = Pycnodonte Fischer von Waldheim 1835 oyster
 Pectinida - Plicatulidae
Plicatula filamentosa Conrad 1833 scallop
 Arcida - Limopsidae
Limopsis sp. Sassi 1827 clam
Limopsis sp. 1
Limopsis sp. Sassi 1827 clam
Limopsis sp. 2
 Arcida - Glycymerididae
Glycymeris minor clam
Glycymeris trigonella minor
Glycymeris trigonella Conrad 1833 clam
Glycymeris staminea Conrad 1833 clam
 Carditida - Carditidae
"Venericardia parva" = Venericardia (Pleuromeris) parva, "Venericardia alticostata" = Venericardia (Claibornicardia) alticostata, "Venericardia rotunda" = Venericardia (Rotundicardia) rotunda, "Venericardia claiboplata" = Venericardia carolinensis
"Venericardia parva" = Venericardia (Pleuromeris) parva Lea 1833 clam
"Venericardia alticostata" = Venericardia (Claibornicardia) alticostata Conrad 1833 clam
"Venericardia rotunda" = Venericardia (Rotundicardia) rotunda Lea 1833 clam
"Venericardia claiboplata" = Venericardia carolinensis Conrad 1848 clam
 Carditida - Astartidae
Lirodiscus tellinoides Conrad 1833 clam
 Carditida - Crassatellidae
Bathytormus protextus Conrad 1832 clam
 Cardiida - Tellinidae
"Tellina papyria" = Tellina (Eurytellina) papyria
"Tellina papyria" = Tellina (Eurytellina) papyria Conrad 1833 tellin clam
 Cardiida - Mactridae
Spisula parilis Conrad 1833 clam
 Cardiida - Veneridae
Callista lisbonensis venus clam
Callista perovata lisbonensis
Callista perovata Conrad 1833 venus clam
Pitar nuttali Conrad 1834 venus clam
Callista aequorea Conrad 1833 venus clam
"Callista mortoni" = Costacallista mortoni Conrad 1834 venus clam
 Cardiida - Ungulinidae
Diplodonta ungulina Conrad 1833 clam
 Pholadida - Corbulidae
"Caryocorbula alabamiensis" = Corbula (Caryocorbula) alabamiensis Lea 1833 clam
 Lucinida - Lucinidae
Lucina sp. Bruguière 1797 clam
"Lucina dolabra" = Recurvella dolabra Conrad 1833 clam
Linga alveata clam
Linga pomilia alveata
Linga pomilia Conrad 1833 clam
Gastropoda
 Opisthobranchia - Retusidae
 Heterostropha - Architectonicidae
Architectonica fungina Conrad 1833 sundial
"Architectonica alveata" = Architectonica (Stellaxis) alveatum Conrad 1833 sundial
Architectonica elaborata Conrad 1833 sundial
 Neotaenioglossa - Calyptraeidae
Crepidula lirata Conrad 1833 slipper shell
 Sorbeoconcha - Vitrinellidae
 Sorbeoconcha - Rostellariidae
Calyptraphorus velatus Conrad 1833 snail
 Neogastropoda - Costellariidae
Uromitra gracilis Lea 1941 ribbed mitre
 Neogastropoda - Marginellidae
 Neogastropoda - Volutidae
Bullata semen, "Athleta petrosus" = Athleta petrosa
Bullata semen Lea 1833 volute
"Athleta petrosus" = Athleta petrosa Conrad 1833 volute
 Neogastropoda - Cancellariidae
Trigonostoma gemmatum Conrad 1833 snail
 Neogastropoda - Olivellidae
Agaronia alabamensis Conrad 1833 snail
Agaronia bombylis Conrad 1833 snail
 Neogastropoda - Olividae
Ancilla staminea Conrad 1832 olive snail
 Neogastropoda - Buccinidae
Buccitriton sagenum Conrad 1833 true whelk
Penion bellus Conrad 1833 true whelk
Pseudoliva vetusta Conrad 1833 true whelk
 Neogastropoda - Fasciolariidae
Mazzalina inaurata Conrad 1833 snail
 Sorbeoconcha - Cassidae
Doliocassis nupera Conrad 1833 snail
 Sorbeoconcha - Naticidae
"Natica semilunata" = Natica (Naticarius) semilunata Lea 1833 moon snail
Neverita limula Conrad 1833 moon snail
Polinices eminulus Conrad 1833 moon snail
 Cerithioidea - Turritellidae
"Turritella carinata" = Haustator carinata Lea 1833 turret shell
Mesalia vetusta Conrad 1833 turret shell
Turritella apita de Gregorio 1890 turret shell
Turritella dutexata Harris 1895 turret shell
Turritella obruta Conrad 1833 turret shell
 Trochoidea - Solariellidae
Solariella stalagmium Conrad 1833 snail