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Geologic Unit: Wabash
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Map showing publication footprint
  • Usage in publication:
    • Wabash group
  • Modifications:
    • Original reference
  • AAPG geologic province:
    • Illinois basin
Publication:

Ashley, G.H., 1902, The Eastern Interior coal field, IN Walcott, C.D., Twenty-second annual report of the Director of the United States Geological Survey; Part III, Coal, oil, cement: U.S. Geological Survey Annual Report, 22, pt. 3, p. 265-305, pls. 16-19.


Summary:

Pg. 273. Wabash group. Main coal-bearing measures, 100 to 600 feet thick. Overlain by Merom sandstone and unconformably underlain by Mansfield sandstone. Age is Pennsylvanian.
Named from Wabash River, IN, which cuts through the various formations.

Source: US geologic names lexicon (USGS Bull. 896, p. 2257).


Map showing publication footprint
  • Usage in publication:
    • Wabash group†
  • Modifications:
    • Abandoned
  • AAPG geologic province:
    • Illinois basin
Publication:

Wilmarth, M.G., 1925, [Selected Geologic Names Committee remarks (ca. 1900-1925) on Carboniferous rocks of the Illinois basin], IN Wilmarth, M.G., 1938, Lexicon of geologic names of the United States (including Alaska): U.S. Geological Survey Bulletin, 896, pts. 1-2, 2396 p.


Summary:

†Wabash group abandoned. Includes Ditney, Somerville, Millersburg, Petersburg, and Brazil formations of Fuller [and Ashley, 1902], or strata of Pottsville, Allegheny, and Conemaugh age.

Source: US geologic names lexicon (USGS Bull. 896, p. 2257).


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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