Ebenezer Member here named for the updip, argillaceous sand subdivision of the Coosawhatchie Formation of the Hawthorne Group. Represents upper part of formation in eastern GA where Charlton Member is absent and middle member where both the Charlton and Berryville Clay (new name) Members are present. Inland, the Ebenezer constitutes the entire Coosawhatchie. Unit is typically gray to olive-gray, fine- to medium-grained, moderately to well-sorted, slightly phosphatic, micaceous, argillaceous sand. Subordinate lithic components include clay, limestone, dolomite, and siliceous claystone. Unit is known to occur from the vicinity of the Savannah River in GA, southward into northeastern FL. Conformably and gradationally overlies the Berryville Clay Member. Generally, disconformably underlies the Cypresshead Formation (new name) or the Raysor Formation; conformably underlies the Charlton Member in the St. Marys River area. Thickness at the type section is only 7 ft (2 m) for the upper and lower boundaries are not exposed. Unit is 62 ft (19 m) in the reference core and the maximum known thickness of 234 ft (71 m) occurs in Wayne Co. Age is assumed to be middle Miocene (early Serravallian) based on its gradational relationship with the Berryville Clay Member.

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

Pg. 4 (fig. 2), 10-11, 13-14. Ebenezer Formation of Hawthorn Group. Huddlestun's Ebenezer Member is removed from the predominantly clay-silt Coosawhatchie Formation and raised to formation rank. As used here, it encompasses all known strata in Georgia that fall within dinoflagellate zones DN 8 through DN 10 (upper Miocene, Tortonian). Includes strata assigned to Charlton Formation by Veatch and Stephenson (1911).

Source: Publication.