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National Geologic Map Database

Geologic Unit: Gunter

Usage:

Gunter Sandstone Member of Gasconade Dolomite (IL*,MO*)
Gunter Sandstone Member of Gasconade Dolomite of Arbuckle Group (subsurface of KS*,OK*)
Gunter Sandstone Member of Oneota Dolomite (IL*)
Gunter Sandstone of Prairie du Chien Group (IL-notably in northern part)
Gunter Sandstone of Knox Group (IL-notably in southern part)
Gunter Sandstone Member of Van Buren Formation (AR*-subsurface)


Geologic age:

earliest Ordovician (Ibexian; Tremadocian; Skullrockian)*


Type section, locality, area and/or origin of name:

Type section: Gunter Spring (Hahatonka Spring, Ha Ha Tonka State Park), in E/2 W/2 sec. 2, T. 37 N., R. 17 W., Camden Co., central MO. Named from abandoned Gunter Post Office, Miller Co., and from Gunter Spring (Thompson, 1991, p. 24; 2001, p. 123).
Type section: at Hahatonka [Gunter or Hahatonka Springs], Camden Co., central MO. Named from abandoned Gunter Post Office, Miller Co. (US geologic names lexicon, USGS Bull. 1200).


AAPG geologic province:

Arkoma basin*
Chautauqua platform*
Cherokee basin*
Forest City basin*
Illinois basin*
Ozark uplift*
Salina basin*
Sedgwick basin*
Upper Mississippi embayment


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 ([ ]).