- Usage in publication:
-
- Gasper oolite*
- Modifications:
-
- Named
- Dominant lithology:
-
- Limestone
- Oolite
- AAPG geologic province:
-
- Cincinnati arch
Summary:
Gasper oolite named for exposures in bluffs along Gasper River in Warren Co., south-central KY. Unit is thick-bedded limestone and oolite and in parts of Breckinridge, Meade, Hardin, Grayson, and perhaps Hart Co. it includes, near the middle, the Sample sandstone member, which has a maximum thickness of 40 ft. Total thickness of formation is greater than 100 ft. Replaces Ulrich's "Tribune limestone." Is not known west of eastern part of Crittenden Co., KY. Lies unconformably on Fredonia oolite member of Ste. Genevieve limestone, as the intervening Rosiclare and Ohara members of the Ste. Genevieve and the Bethel sandstone are absent here. Is older than Cypress sandstone. The Ridenhower shale is equivalent in part to Gasper oolite and possibly is represented only in upper part of Gasper. Age is Mississippian.
Source: GNU records (USGS DDS-6; Reston GNULEX).
- Usage in publication:
-
- Gasper Limestone Member
- Modifications:
-
- Revised
- AAPG geologic province:
-
- Appalachian basin
Summary:
The Greenbrier Limestone of this report is divided into (ascending) Little Valley Limestone Member, St. Louis Limestone Member (Hillsdale Member of Reger, 1926), Ste. Genevieve Limestone Member, and the Gasper Limestone Member. The Gasper occupies the upper part of the Greenbrier and consists of pure micritic or sparry limestone with shale partings. Presence of species TALAROCRINUS, PTEROTOCRINUS SERRATUS Weller, and PENTREMITES GADONI (Defrance) within the Gasper supports the early Chesterian age of the uppermost Greenbrier.
Source: GNU records (USGS DDS-6; Reston GNULEX).
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 conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).