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  • Usage in publication:
    • Assumption coal member
  • Modifications:
    • Principal reference
  • Dominant lithology:
    • Coal
  • AAPG geologic province:
    • Illinois basin
Publication:

Kosanke, R.M., Simon, J.A., Wanless, H.R., and Willman, H.B., 1960, Classification of the Pennsylvanian strata of Illinois: Illinois Geological Survey Report of Investigations, no. 214, 84 p.


Summary:

Pg. 33, 45 (table 1), pl. 1. Assumption coal member of Spoon formation (new) of Kewanee group (new). Present in lower part of Spoon. Tentatively correlated with Murphysboro (No. 1) and Rock Island (No. 1) coals. Age is Middle Pennsylvanian (Desmoinesian). Report presents new rock-stratigraphic classification of Pennsylvanian strata in Illinois. Cyclical classification retained but is entirely independent of rock-stratigraphic classification.
Type locality: mine in NE/4 NW/4 sec. 2, T. 12 N., R. 1 E., Assumption quadrangle, Christian Co., southwestern IL. Coal named by Cady (1935, Illinois Geol. Survey Bull. 62).

Source: Publication; US geologic names lexicon (USGS Bull. 1200, p. 157).


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 ( ).

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