Name Ellaville Limestone credited to Huddlestun (in press) Described from Ellaville 1 core in Suwannee Co., FL, where it occupies interval from 25 ft to 59 ft according to this author. (Huddlestun places lower boundary at 39 ft.) Consists of very porous, fine, sandy calcarenite. Very moldic (molluscan), with abundant TURRITELLA and some CHIONE, LUNULITES, and other bryozoans, lepidocyclinids, and rare solitary coral. Ellaville alternates between a muddy- to fine-sandy, nonmoldic limestone and a moldic molluscan limestone. Underlies Suwannacoochee Dolomite (also of Huddlestun, in press) and overlies Ocala Limestone. Age is early Oligocene.

Source: GNU records (USGS DDS-6; Reston GNULEX).

Name Ellaville Limestone is formally proposed here for a nondistinctive limestone that crops out along the Suwannee and lower Withlacoochee Rivers in Madison, Hamilton, and Suwannee Cos, FL. Extends in the subsurface into southwestern GA. Rocks have been assigned to various units in the past, among them the Hawthorne Formation, the Glendon Limestone, the Byram Limestone, and the Bumpnose Limestone. In addition to the type locality at Ellaville, FL, two reference sections are designated: 1) Florida Geological Survey core Ellaville 1 (W-10657), SW1/4NE1/4, sec. 24, T1S, R11E, interval 25 ft to 39 ft and 2) core Thomas 4 (GGS-3188) approximately 2.4 airline mi northeast of the center of the village of Boston in Thomas Co., GA, interval 273.5 ft to 311.5 ft. The Ellaville is sparsely, but variably macrofossiliferous, calcarenitic, relatively pure, and moderately indurated. The unit is typically massive and structureless and dolomite and dolostone are the only significant minor lithic components. Approximately 8 ft (2.5 m) are exposed along the Suwannee River during mean low water. Formation averages 10 to 15 ft in the type area and thickens to 25 ft in GA before it grades laterally northwestward into the Bridgeboro Limestone. At the type locality and both reference sections, the Ellaville gradationally and conformably underlies the Suwannacoochee Dolostone and overlies the Ocala Group or equivalent, though the lower contact in outcrop is not clear. Age is early Oligocene (Vicksburgian) based on stratigraphic position and correlation with the Glendon Limestone.

Source: GNU records (USGS DDS-6; Reston GNULEX).