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National Geologic Map Database

Geologic Unit: Fraileys

Usage:

Fraileys Shale Member of Golconda Formation (IL*,KY*,MO)


Geologic age:

Middle Mississippian (Visean; early Chesterian)


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

Type locality: easternmost exposure of the Golconda in IL, on the south slope of hill along west edge of NE/4 SE/4 sec. 9, T. 12 S., R. 10 E., Cave in Rock 15-min quadrangle, Hardin Co., southeastern IL. Named from an abandoned village 1 mi to northeast, known variously as Fraileys, Fraileys Landing, or Fraileys Store (McFarlan and others, 1955).


AAPG geologic province:

Illinois basin
Ozark uplift


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 ([ ]).