Geologic Unit: Taum Sauk

Usage:

Taum Sauk limestone facies (informal) in Dug Hill Formation (MO*-recognized locally in St. Francois Mountains area)
Originally spelled Tom Sauk.

Informal. The rank or lithologic term should not be capitalized.

Geologic age:

Middle to Late Cambrian (Lincolnian to Millardan; Marjuman to Sunwaptan?)

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

Type locality: on south side of Little Tom [Taum] Sauk Creek, on boundary between Iron and Reynolds Cos., in W/2 SW/4 sec. 30, T. 33 N., R. 3 E., Iron Co., southeastern MO (Brightman, 1938). [See also MO Geol. Survey lexicon (Thompson, 2001).]
Type section: [poor exposures] along south side of Little Taum Sauk Creek (which follows MO County Road 204) in vicinity of Iron-Reynolds Co. line, in SW/4 sec. 30, T. 33 N., R. 3 E., [approx. Lat. 37 deg. 30 min. 36 sec. N., Long. 90 deg. 46 min. 09 sec. W.], Johnson Shut-Ins 7.5-min quadrangle, Iron Co., southeastern MO (W.B. Howe, 1968, Missouri Geol. Survey Water Res., Rpt. Inv., no. 41, p. 75-77; Thompson and others, 2013).
Reference sections (subsurface): (1) depth-interval 1,590 to 1,805 ft, Gulf Mineral Resources MT-6 core, in SE/4 SW/4 NW/4 sec. 11, T. 28 N., R. 4 E., [approx. Lat. 37 deg. 06 min. 49 sec., N., Long. 90 deg. 35 min. 22 sec. W.], Piedmont SE 7.5-min quadrangle, Wayne Co., southeastern MO, credited to J.R. Palmer; (2) depth-interval 1,341.0 to 1,478.7 ft, Texasgulf 80-MO-10 core, in SW/4 SW/4 SE/4 NW/4 sec. 34, T. 29 N., R. 4 E., [approx. Lat. 37 deg. 08 min. 34 sec. N., Long. 90 deg. 36 min. 17 sec.], Patterson 7.5-min quadrangle, Wayne Co., southeastern MO, credited to J. Thacker (Thompson and others, 2013).

AAPG geologic province:

Ozark uplift