USGS 7075 - Lambert Island (Flint River Fm) (Oligocene of the United States)

Also known as Station 7075

Where: Decatur County, Georgia (30.9° N, 84.6° W: paleocoordinates 31.0° N, 78.1° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Flint River Formation, Early/Lower Oligocene (33.9 - 28.4 Ma)

• From upper bed. Assigned to Lower Oligocene (Rupelian) by Scott et al. 2001 following mapping by Cooke (1945).

• group of beds-level stratigraphic resolution

Environment/lithology: shallow subtidal; lithified, shelly/skeletal, cherty/siliceous limestone

• Shallow-water carbonate environment.
• In coralliferous chert.

Size class: macrofossils

Preservation: cast, mold/impression, replaced with silica

Reposited in the USNM

Collection methods: quarrying,

• Collected by Cooke and Mansfield (1914). Reposted in USNM collections.

Primary reference: W. H. Dall. 1916. A contribution to the invertebrate fauna of the Oligocene beds of Flint, River. Proceedings of the United States National Museum 51(2162):487-524 [A. Miller/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 60832: authorized by Austin Hendy, entered by Austin Hendy on 24.05.2006

Creative Commons license: CC BY (attribution)

Taxonomic list

• Exhaustive for mollusca; from fairly poorly preserved assemblage; many identifications and types based on casts and molds.
Bivalvia
 Pectinida - Pectinoidae
"Pecten (Aequipecten) suwaneensis" = Aequipecten suwaneensis
"Pecten (Aequipecten) suwaneensis" = Aequipecten suwaneensis Dall 1898 scallop
 Carditida - Carditidae
 Lucinida - Lucinidae
 Cardiida - Cardiidae
"Cardium (Trachycardium) glebosum" = Agnocardia glebosum
"Cardium (Trachycardium) glebosum" = Agnocardia glebosum Conrad 1848 cockle
 Cardiida - Tellinidae
Tellina segregata Dall 1900 tellin clam
 Cardiida - Veneridae
"Chione bainbridgensis" = Chione (Chionopsis) bainbridgensis
"Chione bainbridgensis" = Chione (Chionopsis) bainbridgensis Dall 1916 venus clam
Gastropoda
 Neritoidea - Neritidae
 Cerithioidea - Diastomatidae
 Cerithioidea - Cerithiidae
Cerithium insulatum Dall 1916 cerith snail
"Cerithium vaginatum" = Cestumcerithium vaginatum Mansfield 1937 cerith snail
Bittium silicium cerith snail
 Cerithioidea - Turritellidae
Turritella tampae Heilprin 1887 turret shell
 Sorbeoconcha - Naticidae
Sinum imperforatum Dall 1915 moon snail
 Neogastropoda - Turbinellidae
"Xancus wilsoni" = Turbinella wilsoni
"Xancus wilsoni" = Turbinella wilsoni Conrad 1848 snail
 Architaenioglossa - Ampullinidae