Usage:
Gibbons Conglomerate Lentil of Marble Falls Limestone (TX)
Gibbons Conglomerate Member of Big Saline Formation (TX)
Geologic age:
Pennsylvanian, Middle
Type section, locality, area and/or origin of name:
Type section: 0.25 mi north of San Saba-Brady Road, on the Gibbons Ranch, 2.5 mi south of Hall, San Saba Co., central TX (Plummer, 1945).
AAPG geologic province:
Llano 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 conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).