USGS Loc. 12739 - Noble Ferry Bridge [Suwanee Lmst] (Oligocene of the United States)

Also known as Mansfield Loc. 55

Where: Hamilton County, Florida (29.8° N, 82.9° W: paleocoordinates 29.8° N, 76.6° 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%

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 60972: authorized by Arnold Miller, entered by Chad Ferguson on 28.05.2006

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