Usage:
Welge Sandstone Member of Wilberns Formation of Moore Hollow Group (TX)
Welge Sandstone Member of Wilberns Formation (TX*)
Geologic age:
Late Cambrian*
Type section, locality, area and/or origin of name:
Type section: along Squaw Creek [now Big Nixon Creek] approx. 0.5 mi north of Gillespie Co. line [approx. Lat. 30 deg. 30 min. 12 sec. N., Long. 99 deg. 04 min. 00 sec. W., Loyal Valley 7.5-min quadrangle, Mason Co., central TX]. Named from Welge land survey between Threadgill and Squaw Creeks (Bridge and others, 1947).
[Additional locality information from USGS historical topographic map collection TopoView, accessed on February 17, 2025). Geographic feature Squaw Creek renamed Big Nixon Creek (U.S. Board on Geographic Names, December 2022, USGS GNIS FeatureID 1369064) in accordance with the Department of the Interior's Secretarial Order 3404.]
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 ([ ]).