Usage:
Grindstone Creek Formation of Strawn Group (TX)
Subunits:
(alphabetical) --all in TX: Brannon Bridge Limestone Member, Buck Creek Sandstone Member, [?]/Gibson Limestone Member, [?]Goen Limestone Member, [?]Ricker Station Limestone Member, [?]Santo Limestone Member.
Geologic age:
Pennsylvanian, Middle
Type section, locality, area and/or origin of name:
West of Grindstone Creek, Parker Co., central TX. Exposures occur in scarps and artificial cuts near Brazos River; lower shales are exposed in scarp north of U.S. Highway 80, east of river; middle part exposed in roadcut of Bennett. Upper part composes scarp west of Bennet; type section includes these exposures and extends from top of Brannon Bridge Limestone to top of easternmost Goen Limestone on highland west of Bennett (Plummer and Hornberger, 1933; credited to G. Scott and J.M. Armstrong, unpub. report).
AAPG geologic province:
Fort Worth syncline
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 ([ ]).