Helen Group. Used informally by Gillon, 1982 (Stratigraphic, structural, and metamorphic geology of portions of the Cowrock and Helen 7.5-min quadrangles, Athens, GA, University of Georgia, MS thesis, 236 p.), is here adopted for metamorphic rocks of the Helen thrust sheet between the Dahlonega and Shope Fork faults, Georgia and North Carolina. Includes the Nacoochee (new name), Horton (new name) (= Gillon's informal Chattahoochee), and Robertstown (new name) (= Gillon's informal Unicoi Park) Formations. The Group is fault bounded and isoclinally folded. The nature of the contact with the overlying Coweeta Group is uncertain. Age is tentatively Late Proterozoic and early Paleozoic.
Type locality: exposures near the town of Helen, Helen 7.5-min quadrangle, White Co., GA (Gillon, 1982).

Source: US geologic names lexicon (USGS Bull. 1565, p. 127).