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National Geologic Map Database
Geologic Unit: Hoffner
Map showing publication footprint
  • Usage in publication:
    • Hoffner member
  • Modifications:
    • Original reference
  • Dominant lithology:
    • Shale
    • Sandstone
  • AAPG geologic province:
    • Illinois basin
Publication:

Weller, J.M., 1939, Explanation and stratigraphic summary, IN Weller, Stuart, and Krey, F.F., Preliminary geologic map of the Mississippian formations in the Dongola, Vienna, and Brownfield quadrangles: Illinois Geological Survey Report of Investigations, no. 60, 11 p.


Summary:

Pg. 7, 8. Hoffner member of Ste. Genevieve limestone. Predominantly sandy shale and fine-grained sandstone that is locally massive. Associated with these strata are red shales at several horizons and in middle part of member one or more limestones. Thickness between 50 and 80 feet. Overlies Levias member; unconformably underlies Renault limestone. Age is Mississippian (Meramec).
Well exposed along Swan Creek northeast of Anna in E/2 sec. 17, T. 12 S., R. 1 W., and east of Hoffner School in W/2 sec. 8, T. 13 S., R. 1 E., Union Co., southern IL.

Source: US geologic names lexicon (USGS Bull. 1200, p. 1775-1776).


Map showing publication footprint
  • Usage in publication:
    • Hoffner beds
  • Modifications:
    • Revised
  • AAPG geologic province:
    • Illinois basin
Publication:

For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.

Asterisk (*) indicates usage by the U.S. Geological Survey. Other usages by state geological surveys.

"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 does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).