USGS Loc. 7079 - Mascot Point (Flint River Fm) (Oligocene of the United States)

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 (Rupelinan) by Scott et al. 2001 following mapping by Cooke (1945).

• group of beds-level stratigraphic resolution

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

• Shallow-water carbonate environment.
• Limestone; from chert blocks

Size class: macrofossils

Preservation: cast, mold/impression, replaced with silica

Reposited in the USNM

Collection methods: quarrying,

• Collected by Vaughan, 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 60835: 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.
 Pectinida - Pectinoidae
"Pecten (Aequipecten) suwaneensis" = Aequipecten suwaneensis
"Pecten (Aequipecten) suwaneensis" = Aequipecten suwaneensis Dall 1898 scallop
 Mytilida - Mytilidae
 Carditida - Crassatellidae
 Cardiida - Veneridae
"Chione bainbridgensis" = Chione (Chionopsis) bainbridgensis
"Chione bainbridgensis" = Chione (Chionopsis) bainbridgensis Dall 1916 venus clam
 Lucinida - Lucinidae
Phacoides perovatus, "Phacoides (Miltha) hillsboroensis" = Miltha hillsboroensis, "Phacoides (Miltha) ocalanus" = Pseudomiltha ocalanus
Phacoides perovatus Dall 1916 clam
"Phacoides (Miltha) hillsboroensis" = Miltha hillsboroensis Heilprin 1887 clam
"Phacoides (Miltha) ocalanus" = Pseudomiltha ocalanus Dall 1903 clam
 Architaenioglossa - Ampullinidae
 Neogastropoda - Turbinellidae
"Xancus wilsoni" = Turbinella wilsoni
"Xancus wilsoni" = Turbinella wilsoni Conrad 1847 snail
 Neogastropoda - Conidae
Conus cookei Dall 1916 cone shell
 Stromboidea - Strombidae
"Strombus chipolanus" = Persististrombus chipolanus
"Strombus chipolanus" = Persististrombus chipolanus Dall 1890 true conch
 Stromboidea - Thersiteidae
Orthaulax hernandoensis Mansfield 1937 snail
 Naticoidea - Naticidae
 Xenophoroidea - Xenophoridae
Xenophora conchyliophora Born 1780 carrier shell
 Tonnoidea - Bursidae
Bursa vitrix frog shell
 Tonnoidea - Cassidae
Cassis sulcifera Sowerby 1850 snail
 Sorbeoconcha - Turritellidae
Turritella sp. Lamarck 1799 turret shell
 Sorbeoconcha - Cerithiidae