Claiborne Bluff 7 (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 5335: authorized by Arnold Miller, entered by Karen Layou on 24.09.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

Gastropoda
 Neotaenioglossa - Calyptraeidae
Crepidula dumosa Conrad 1834 slipper shell
 Cerithioidea - Siliquariidae
Tenagodus vitis Conrad 1835 snail
 Cerithioidea - Turritellidae
"Turritella carinata" = Haustator carinata, Mesalia vetusta
"Turritella carinata" = Haustator carinata Lea 1833 turret shell
Mesalia vetusta Conrad 1833 turret shell
 Sorbeoconcha - Vermetidae
Serpulorbis squamulosus Conrad 1834 worm shell
 Neogastropoda - Olivellidae
Agaronia alabamensis Conrad 1833 snail
 Neogastropoda - Volutidae
"Athleta petrosus" = Athleta petrosa
"Athleta petrosus" = Athleta petrosa Conrad 1833 volute
 Neogastropoda - Buccinidae
Buccitriton sagenum Conrad 1833 true whelk
 Neogastropoda - Turridae
Eopleurotoma sayi Lea 1833 turrid
 Sorbeoconcha - Rostellariidae
Calyptraphorus velatus Conrad 1833 snail
 Opisthobranchia - Retusidae
Bivalvia
 Nuculida - Nuculidae
"Nucula ovula" = Nucula (Nucula) ovula
"Nucula ovula" = Nucula (Nucula) ovula Lea 1833 nut clam
 Carditida - Crassatellidae
Bathytormus protextus Conrad 1832 clam
 Carditida - Carditidae
"Venericardia rotunda" = Venericardia (Rotundicardia) rotunda, "Venericardia alticostata" = Venericardia (Claibornicardia) alticostata, "Venericardia parva" = Venericardia (Pleuromeris) parva
"Venericardia rotunda" = Venericardia (Rotundicardia) rotunda Lea 1833 clam
"Venericardia alticostata" = Venericardia (Claibornicardia) alticostata Conrad 1833 clam
"Venericardia parva" = Venericardia (Pleuromeris) parva Lea 1833 clam
 Carditida - Astartidae
Lirodiscus tellinoides Conrad 1833 clam
 Lucinida - Lucinidae
Linga alveata clam
Linga pomilia alveata
Linga pomilia Conrad 1833 clam
 Pholadida - Corbulidae
"Caryocorbula alabamiensis" = Corbula (Caryocorbula) alabamiensis Lea 1833 clam
"Caryocorbula densata" = Corbula densata Conrad 1854 clam
 Cardiida - Veneridae
Callista perovata Conrad 1833 venus clam
 Cardiida - Ungulinidae
Diplodonta ungulina Conrad 1833 clam
 Arcida - Glycymerididae
Glycymeris minor clam
Glycymeris trigonella minor
Glycymeris trigonella Conrad 1833 clam
Glycymeris staminea Conrad 1833 clam