USGS Loc. 12762 - N of Hudson [Suwannee Lmst] (Oligocene of the United States)

Also known as Mansfield Loc. 29

Where: Pasco County, Florida (28.2° N, 82.2° W: paleocoordinates 28.2° N, 75.9° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Suwannee Limestone Formation (Vicksburg Group), Rupelian (33.9 - 28.1 Ma)

• Cunningham et al. (1998) identified Suwannee LS as Early Oligocene age. Cooke and Mansfield (1936) assigned Suwannee to Vicksburg group. Suwannee assigned to Rupelian Stage (early Oligocene) by Brewster-Wingard et al. (1987) and COSUNA (1988).

• formation-level stratigraphic resolution

Environment/lithology: lithified, white limestone

• Author notes that the fauna indicate warm water conditions rather than cold.
• The formation consists almost entirely of limestone. The unweathered rock is a granular to dense, compact, usually cream-colored rather pure limestone. The lower par is at many places more granular than the upper. Mossom (1925) provided the following lithologic description from the Suwannee LS quarry of the Florida Hard Rock Products Co., Brooksville, FL: Silica - 6.54%; Iron and aluminum - 1.44%; Calcium carbonate - 91.09%; Magnesium carbonate - trace; Undetermined - 0.93%

Reposited in the USGS

Primary reference: W. C. Mansfield. 1937. Molluscs of the Tampa and Suwannee Limestones. Geological Bulletin, State of Florida Department of Conservation 15:1-334 [A. Miller/C. Ferguson/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 60663: authorized by Arnold Miller, entered by Chad Ferguson on 19.05.2006

Creative Commons license: CC BY (attribution)

Taxonomic list

• Occurrence based data only
Show authors, comments, and common names
Echinoidea
 Cassiduloida - Cassidulidae
Rhyncholampas gouldii
Rhyncholampas gouldii Bouvé 1846 sea urchin
Gastropoda
 Cerithioidea - Cerithiidae
"Cerithium pascoensis" = Cestumcerithium pascoensis
"Cerithium pascoensis" = Cestumcerithium pascoensis Mansfield 1937 cerith snail
 Cerithioidea - Turritellidae
Turritella bowenae
Turritella bowenae Mansfield 1937 turret shell
 Architaenioglossa - Ampullinidae
Ampullina flintensis
Bivalvia
 Mytilida - Mytilidae
Modiolus silicatus
 Pectinida - Limidae
Lima halensis
Lima halensis Dall 1916 file clam
 Arcida - Glycymerididae
Glycymeris suwannensis
Glycymeris suwannensis Mansfield 1937 clam
 Cardiida - Cardiidae
Cardium aff. gadsdenense
Cardium aff. gadsdenense Mansfield 1937 cockle
 Cardiida - Veneridae
"Chione aff. bainbridgensis" = Chione (Chionopsis) bainbridgensis
"Chione aff. bainbridgensis" = Chione (Chionopsis) bainbridgensis Dall 1916 venus clam
 Pholadida - Teredinidae
"? Teredo incrassata" = Kuphus incrassatus
"? Teredo incrassata" = Kuphus incrassatus Gabb 1873 clam
 Lucinida - Lucinidae
Phacoides ? hillsboroensis
Phacoides ? hillsboroensis Heilprin 1887 clam