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Geologic Unit: Bibb
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Map showing publication footprint
  • Usage in publication:
    • Bibb dolomite
  • Modifications:
    • First used
  • Dominant lithology:
    • Dolomite
  • AAPG geologic province:
    • Appalachian basin
Publication:

Ulrich, E.O., 1915, Bibliographic index of American Ordovician and Silurian fossils: U.S. National Museum Bulletin, v. 2, no. 92, p. 1512.


Summary:

Name Bibb dolomite used in chart for the rocks in AL below the Lower Knox and above the Ketona dolomite.

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


Map showing publication footprint
  • Usage in publication:
    • Bibb dolomite*
  • Modifications:
    • Named
  • AAPG geologic province:
    • Appalachian basin
Publication:

Butts, Charles, 1926, The Paleozoic rocks, IN Adams, G.I., and others, Geology of Alabama: Geological Survey of Alabama Special Report, no. 14, p. 41-230.


Summary:

Bibb dolomite named at old Bibb Furnace, about 2 mi west of Brierfield, Bibb Co., north-central AL. Described as a thick-bedded, dark, coarsely crystalline, highly siliceous dolomite that yields boulders deeply encrusted with cavernous drusy silica. Weathered layers are deeply pitted. Very closely resembles Brierfield dolomite and would not be separated from it except that pure Ketona Dolomite lies between the two. Thickness 250 to 500 ft. Overlies Ketona dolomite and underlies Copper Ridge dolomite. No fossils have been found. Age is Late Cambrian.

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


Map showing publication footprint
  • Usage in publication:
    • Bibb Dolomite Member
  • Modifications:
    • Revised
  • AAPG geologic province:
    • Appalachian basin
Publication:

Hughes, T.H., and Lynch, R.E., Jr., 1973, Barite in Alabama: Geological Survey of Alabama Circular, no. 85, 43 p.


Summary:

Bibb Dolomite reduced in rank in this report and assigned to Conasauga Formation.

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


Map showing publication footprint
  • Usage in publication:
    • Bibb Dolomite
  • Modifications:
    • Overview
  • AAPG geologic province:
    • Appalachian basin
Publication:

Raymond, D.E., Osborne, W.E., Copeland, C.W., and Neathery, T.L., 1988, Alabama stratigraphy: Geological Survey of Alabama Circular, no. 140, 97 p.


Summary:

Bibb Dolomite is a dark-gray coarsely crystalline, thick-bedded, highly siliceous dolomite, characterized by locally abundant chert with irregular cavities. Crops out in the southern part of the eastern Valley and Ridge. Thickness ranges from 250 to 500 ft. Age is Late Cambrian (Franconian).

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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