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Map showing publication footprint
  • Usage in publication:
    • Andy Mountain Formation
  • Modifications:
    • Original reference
  • Dominant lithology:
    • Schist
    • Quartzite
    • Gneiss
  • AAPG geologic province:
    • Piedmont-Blue Ridge province
Publication:

Abrams, C.E., and McConnell, K.I., 1981, Stratigraphy of the area around the Austell-Frolona antiform, west-central Georgia, IN Wigley, P.B., ed., Latest thinking on the stratigraphy of selected areas in Georgia; Volume 1: Georgia Geologic Survey Information Circular, no. 54-A, p. 55-67.


Summary:

The Andy Mountain Formation of the informal Roosterville group, here named, is in the Austell-Frolona antiform, west-central Georgia. Consists of garnet-muscovite-quartz schist and quartzite containing local horizons of gneiss. Stratigraphically overlies but structurally underlies the New Georgia Group (new name); stratigraphically underlies the Bill Arp Formation (new name), but folding has placed it structurally over the Bill Arp and the intrusive Austell Gneiss. Age is Proterozoic.
Type locality: Andy Mountain, 1.5 mi west of Winston, Winston 7.5-min quadrangle, Douglas Co., west-central GA. Named from Andy Mountain.

Source: US geologic names lexicon (USGS Bull. 1565, p. 11).


Map showing publication footprint
  • Usage in publication:
    • Andy Mountain Formation
  • Modifications:
    • Revised
    • Age modified
  • AAPG geologic province:
    • Piedmont-Blue Ridge province
Publication:

McConnell, K.I., and Abrams, C.E., 1984, Geology of the greater Atlanta region: Georgia Geologic Survey Bulletin, no. 96, 127 p.


Summary:

The Andy Mountain Formation is here assigned to the Sandy Springs Group (western belt). It conformably overlies the Dog River Formation and stratigraphically underlies the Bill Arp Formation. Age is Late Proterozoic and (or) early Paleozoic.

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


Map showing publication footprint
  • Usage in publication:
    • Andy Mountain Formation†
  • Modifications:
    • Abandoned
  • AAPG geologic province:
    • Piedmont-Blue Ridge province
Publication:

Higgins, M.W., Atkins, R.L., Crawford, T.J., Crawford, R.F., III, Brooks, Rebekah, and Cook, R.B., Jr., 1988, The structure, stratigraphy, tectonostratigraphy, and evolution of the southernmost part of the Appalachian Orogen, Georgia and Alabama: U.S. Geological Survey Professional Paper, 1475, 173 p., (incl. geologic map, scale 1:500,000)


Summary:

The Andy Mountain Formation of Abrams and McConnell (1981), assigned to the Sandy Springs Group by McConnell and Abrams (1984), is here abandoned because it is partly the same unit as the Chattahoochee Palisades Quartzite of the Sandy Springs Group, and partly the same as the Canton Schist of Bayley (1928), also here abandoned. Canton rocks now referred to as the Cherokee alteration zone of the Ropes Creek Metabasalt.

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


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For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.

Asterisk (*) indicates usage by the U.S. Geological Survey. Other usages by state geological surveys.

"No current usage" (†) implies that a name has been abandoned or has fallen into disuse. Former usage and, if known, replacement name given in parentheses ( ).

Slash (/) indicates name does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).