Usage:
Hyrum Dolostone (ID*,UT*)
Hyrum Dolomite Member of Jefferson Formation (UT*)
Hyrum Member of Jefferson Dolostone (ID*)
Subunits:
FORMATION STATUS: Samaria Limestone Member (UT).
Geologic age:
Middle to Late Devonian*
Type section, locality, area and/or origin of name:
Named from exposures in mouth of Blacksmith Fork Canyon, east of town of Hyrum, in sec. 7, T. 10 N., R. 2 E., [Paradise 7.5-min quadrangle], Cache Co., northern UT (Williams, 1948).
AAPG geologic province:
Great Basin province
Snake River basin*
Wasatch uplift*
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 ([ ]).