Usage:
Leatham Formation (ID*,UT*,WY*)
Leatham Member of Pilot Shale (UT)
Geologic age:
late Late Devonian (Famennian)*; locally Mississippian(?)*
Type section, locality, area and/or origin of name:
Exposures on north wall of Leatham Hollow, for which unit is named, 3/4 mi west of Left Fork of Blacksmith Fork, in NW corner sec. 34, T. 11 N., R. 2 E., Cache Co., UT (Holland, 1952).
Principal reference section designated in Little Mile-and-a-Half Canyon, in N/2 sec. 29, T. 18 S., R. 16 W., Confusion Range, Millard Co., UT (Sandberg and others, 1980).
AAPG geologic province:
Wasatch uplift*
Great Basin province*
Green River 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 ([ ]).