Usage:
Helms Formation (NM*,TX*)
Geologic age:
Late Mississippian (Chesterian)*
Type section, locality, area and/or origin of name:
[Type section]: measured section C, in short canyon [now Martin Canyon] about 1 mi south of Helms Peak, and about 2.5 mi north of Helms West Well, [in vicinity of Lat. 31 deg. 48 min. 15 sec. N., Long. 106 deg. 01 min. 20 sec. W., Helms West Well 7.5-min quadrangle], Hueco Mountains, El Paso Co., western TX (Beede, 1920).
Probably named from Helms Peak, elevation 5,392 ft, [approx. Lat. 31 deg. 49 min. 15 sec. N., Long. 106 deg. 01 min. 35 deg. W., El Paso quadrangle, scale 1:125,000, ca. 1920 and earlier editions], Hueco Mountains, El Paso Co., western TX (Beede, 1920).
AAPG geologic province:
Orogrande basin*
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 ([ ]).