U.S. Geological Survey Home AASG Logo USGS HOME CONTACT USGS SEARCH USGS
National Geologic Map Database
Map showing publication footprint
  • Usage in publication:
    • Shullsburg Member
  • Modifications:
    • Not used
  • AAPG geologic province:
    • Illinois basin
Publication:

Thompson, T.L., 2001, Lexicon of stratigraphic nomenclature in Missouri: Missouri Division of Geology and Land Survey Report of Investigations, no. 73, 371 p.


Summary:

Pg. 233-234; T.L. Thompson, 1991, Missouri Dept. of Nat. Res., Div. Geol. and Land Survey Rept. of Inv., no. 70, pt. 2, p. 168. The Shullsburg Member of Quimbys Mill Formation of Plattin subgroup [informal] of Platteville Group of Templeton and Willman (1963) and Willman and Kolata (1978) not recognized in Missouri. Quimbys Mill Formation = upper part of Macy Limestone of Plattin Group in Missouri.
The Quimbys Mill Formation was proposed for Platteville strata of the Illinois basin, and was extended into Missouri by Templeton and Willman (1963). However, the nomenclature proposed in 1951 by Larson was found by Thompson (1991) to more adequately represent Plattin strata in Missouri, and Quimbys Mill was not used. Age is Ordovician (Mohawkian).
References cited:
Larson, E.R., 1951, "Stratigraphy of the Plattin group, southeastern Missouri," AAPG Bull., v. 35, p. 2041-2075.
Templeton, J.S., and Willman, H.B., 1963, "Champlainian Series (Middle Ordovician) in Illinois," Illinois Geol. Survey Bull., no. 89, 260 p.
Thompson, T.L., 1991, "Paleozoic succession in Missouri, Part 2 - Ordovician System," Missouri Dept. of Nat. Res., Div. Geol. and Land Survey Rept. Of Inv., no. 70, pt. 2, 282 p.
Willman, H.B., and Kolata, D.R., 1978, "The Platteville and Galena Groups in northern Illinois," Illinois State Geol. Survey Circ., no. 502, 75 p.
["Subgroup" not recognized as a formal stratigraphic rank term (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). Considered informal and should not be capitalized.]

Source: Publication.


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 ([ ]).