National Geologic Map Database

Geologic Unit: Roubidoux


Roubidoux Dolomite (MO*)
Roubidoux Formation (AR*,IL*,MO*)
Roubidoux Dolomite of Arbuckle Group (OK*, and KS*-subsurface)
Roubidoux Formation of Arbuckle Group (OK*, and KS*-subsurface)

Geologic age:

Early Ordovician (Canadian; Ibexian)*

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

Named from Roubidoux Creek, in Texas and Pulaski Cos., central MO (Nason, 1892).
Type section: along southeast-facing hillside above Roubidoux Creek, in SE/4 NW/4 SW/4 sec. 10, T. 33 N., R. 12 W., Roby 7.5-min quadrangle, Texas Co., central MO. Widely distributed throughout most of Ozark uplift in MO (Heller, 1954).
Reference sections in MO (Thompson, 1991):
(1) east side of MO Highway 17 at bridge over Jacks Fork, in center S/2 NW/4 sec. 36, T. 28 N., R. 7 W., Pine Crest 7.5-min quadrangle, southeastern Texas Co.;
(2) along U.S. Interstate Highway I-44 between Saint Robert exit and bridge over Roubidoux Creek, from NW/4 SW/4 to NE/4 NE/4 sec. 30, T. 36 N., R. 11 W., Waynesville 7.5-min quadrangle, Texas Co.;
(3) small roadcut at west end of north frontage road to I-44 about 2 mi west of West Rolla interchange, in SE/4 SW/4 sec. 8, T. 37 N., R. 8 W., Rolla 7.5-min quadrangle, Phelps Co.

AAPG geologic province:

Anadarko basin*
Arkoma basin*
Central Kansas uplift*
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 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 does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).