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Geologic Unit: Somerville
Map showing publication footprint
  • Usage in publication:
    • Somerville limestone
  • Modifications:
    • Original reference
  • Dominant lithology:
    • Limestone
  • AAPG geologic province:
    • Illinois basin
Publication:

Fuller, M.L., and Ashley, G.H., 1902, Ditney folio, Indiana: U.S. Geological Survey Geologic Atlas of the United States Folio, GF-84, 8 p., scale 1:125,000


Summary:

Pg. 2. Somerville formation. Limestone, 30 feet thick, with shale member in middle. Overlain by Ditney formation and underlain by Millersburg formation.
Named from Somerville, Gibson Co., southwestern IN.

Source: US geologic names lexicon (USGS Bull. 896, p. 2026).


Map showing publication footprint
  • Usage in publication:
    • Somerville limestone
  • Modifications:
    • Not used
  • 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:

Somerville limestone. The Indiana Geol. Survey now includes these beds in Shelburn formation. (See E.R. Cumings, 1922, Handbook Indiana Geol., pt. 4, Sep. Pub., no. 21.)

Source: US geologic names lexicon (USGS Bull. 896, p. 2026).


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

Kottlowski, F.E., 1954, Geology and coal deposits of the Dugger quadrangle, Sullivan County, Indiana: U.S. Geological Survey Coal Investigations Map, C-11, 1 sheet, scale 1:24,000


Summary:

†Somerville limestone. Replaced with West Franklin limestone.

Source: US geologic names lexicon (USGS Bull. 1200, p. 3659).


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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