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National Geologic Map Database

Geologic Unit: Leatham

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 does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).