Usage:
No current usage.
(Rocks of †Sandy Formation of Packsaddle Group of †Llano Supergroup (TX) reallocated to Packsaddle Schist. See Packsaddle.)
Geologic age:
Precambrian
Type section, locality, area and/or origin of name:
Along Sandy Creek, from near State Highway 71 bridge, Dunman Mountain quadrangle, to near mouth of Cottonwood Creek, Click quadrangle, Llano Co., TX (McGehee, 1979).
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 ([ ]).