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  • Usage in publication:
    • Dykersburg Shale Member
  • Modifications:
    • Named
  • Dominant lithology:
    • Shale
  • AAPG geologic province:
    • Illinois basin
Publication:

Hopkins, M.E., 1968, Harrisburg (#5) coal reserves of southeastern Illinois: Illinois Geological Survey Circular, no. 431, 25 p.


Summary:

Named as a member of Carbondale Formation. Named for town of Dykersburg, Williamson Co., south-central IL. Consists of gray, silty shale. Thickness ranges from 4.6 to 30 m. Age is Middle Pennsylvanian (Desmoinesian).

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


Map showing publication footprint
  • Usage in publication:
    • Dykersburg Shale Member*
  • Modifications:
    • Overview
  • AAPG geologic province:
    • Illinois basin
Publication:

Willard, D.A., DiMichele, W.A., Eggert, D.L., Hower, J.C., Rexroad, C.B., and Scott, A.C., 1995, Paleoecology of the Springfield Coal Member (Desmoinesian, Illinois basin) near the Leslie Cemetery paleochannel, southwestern Indiana: International Journal of Coal Geology, v. 27, no. 1, p. 59-98.


Summary:

A nonmarine gray shale, equivalent to Dykersburg Shale Member of Carbondale Formation in IL, forms roof of Springfield Coal Member of Petersburg Formation in IN.

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 ([ ]).

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