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

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