- Usage in publication:
-
- Iuka formation
- Modifications:
-
- Named
- Dominant lithology:
-
- Chert
- Limestone
- AAPG geologic province:
-
- Black Warrior basin
Morse, W.C., 1928, Paleozoic rocks of Mississippi: Journal of Geology, v. 36, no. 1, p. 31-43.
Summary:
Iuka formation described in Tishomingo Co., MS, as almost wholly chert and pulverulent silica. At one or two places in MS and at several places in AL, contains limestone as well as chert. Overlies Carmack limestone, with great unconformity, and is separated from overlying Alsobrook formation by a large unconformity. Age is Mississippian.
Source: GNU records (USGS DDS-6; Reston GNULEX).
- Usage in publication:
-
- Iuka
- Modifications:
-
- Not used
- AAPG geologic province:
-
- Black Warrior basin
Summary:
Iuka Formation not used. In this report, local names of Morse (1928, 1930), Iuka Formation and Carmack Limestone, are dropped in favor of more widely accepted nomenclature of Butts (1926, Welch (1958, 1959) and Thomas (1972, 1979). Fort Payne and Tuscumbia Formations used here.
Source: GNU records (USGS DDS-6; Reston GNULEX).
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 ([ ]).