Usage:
Jack Valley Member of Laketown Dolomite (NV,UT)
Jack Valley Member of Laketown Dolostone (UT)
Geologic age:
early Silurian (Wenlock)
Type section, locality, area and/or origin of name:
Notable exposures on west side of Jack Valley, in sec. 25, T. 21 S., R. 15 W., [Pyramid Knoll 7.5-min quadrangle], Confusion Range, Millard Co., western UT (Rush, 1956).
AAPG geologic province:
Wasatch uplift
Great Basin province
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 ([ ]).