Usage:
Frenchman Mountain Dolostone of Tonto Group (AZ, and NV-local)
Geologic age:
late Middle to Late Cambrian (Lincolnian to Millardan; Marjuman to Steptoean)
Type section, locality, area and/or origin of name:
[Principal reference section]: measured section just east of Las Vegas, in a prominent unnamed canyon 0.7 km south of East Lake Mead Blvd. on western face of Frenchman Mountain. The mouth of this canyon is at Lat. 36 deg. 11 min. 29 sec. N., Long. 115 deg. 00 min. 28 sec. W., [approx. bdry. btw. secs. 23 and 24, T. 20 S., R. 62 E.], Las Vegas NE 7.5-min quadrangle, Clark Co., southern NV. Section extends into adjacent Frenchman Mountain 7.5-min quadrangle. Named from Frenchman Mountain, Clark Co., southern NV (Rowland and others, 2023; name credited to V.S. Korolev, 1997, Univ. Nevada-Las Vegas MS thesis).
AAPG geologic province:
Plateau sedimentary province
South Western Overthrust
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 ([ ]).