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  • Usage in publication:
    • Frog Mountain sandstone
  • Modifications:
    • Named
  • Dominant lithology:
    • Sandstone
  • AAPG geologic province:
    • Appalachian basin
Publication:

Hayes, C.W., 1894, Geology of a portion of the Coosa Valley in Georgia and Alabama: Geological Society of America Bulletin, v. 5, p. 465-480.


Summary:

Frog Mountain sandstone named. May be Oriskany. Underlies Chattanooga black shale and overlies Rockwood sandstone in northeastern AL and northwestern GA. Assigned to Devonian.

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


Map showing publication footprint
  • Usage in publication:
    • Frog Mountain sandstone*
  • Modifications:
    • Areal extent
    • Revised
  • AAPG geologic province:
    • Appalachian basin
Publication:

Butts, Charles, 1927, The Devonian of Alabama: American Journal of Science, 5th series, v. 14, p. 365-380.


Summary:

All Devonian sandstones of AL have heretofore been called Frog Mountain sandstone, but the 300 ft of Devonian sandstone at Frog Mountain, the type locality, is all of Onondaga age. The name Frog Mountain sandstone is therefore here restricted to the sandstones in AL that are of Onondaga age, and the new name Clear Branch sandstone is introduced for the sandstones in AL that are of Hamilton age. The restricted Frog Mountain sandstone is present in Frog Mountain and elsewhere in Cherokee Co. and north part of Calhoun Co., and also at Leeds, Shelby Co., and probably farther south to Shelby, Calera, and Centerville regions.

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


Map showing publication footprint
  • Usage in publication:
    • Frog Mountain Sandstone*
  • Modifications:
    • Overview
  • AAPG geologic province:
    • Piedmont-Blue Ridge province
Publication:

Crawford, T.J., Higgins, M.W., Crawford, R.F., Atkins, R.L., Medlin, J.H., and Stern, T.W., 1999, Revision of stratigraphic nomenclature in the Atlanta, Athens, and Cartersville 30' x 60' quadrangles, Georgia: Georgia Geologic Survey Bulletin, no. 130, 45 p.


Summary:

Frog Mountain Sandstone unconformably overlies Rockmart Slate or Tellico Formation in western GA. Considered a coarse-grained, proximal facies of Armuchee Chert. Age is Devonian. Report includes geologic map and correlation chart.

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 published by U.S. Geological Survey authors.

"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 conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).

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