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National Geologic Map Database

Geologic Unit: Reagan

Usage:

Reagan Sandstone (KS*,MO, and CO*-subsurface)
Reagan Sandstone of Timbered Hills Group (OK*)


Geologic age:

Late Cambrian*


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

Named from village [of Reagan, 10 mi north of Tishomingo, in Tishomingo quadrangle, Johnston Co., central southern OK], which is situated near the small area of the formation on north side of the granite (Taff, 1903).
Type section: about 5 mi southwest of village of Mill Creek, Johnston Co., central southern OK (Decker, 1939).


AAPG geologic province:

Anadarko basin
Arkoma basin
Central Kansas uplift
Cherokee basin
Chautauqua platform
Las Animas arch*
Las Vegas-Raton basin*
Ouachita folded belt*
Ozark uplift
Palo Duro basin
Sedgwick basin
South Oklahoma folded belt*


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 ([ ]).