Sunnyside tuff (informal) in Challis Volcanics (ID)
Sunnyside rhyolite (informal) in Challis Volcanics (ID)
Sunnyside tuff (informal) of /Challis Volcanic Group (ID)
Informal. The rank or lithologic term should not be capitalized. [A group name combines a geographic name with the term "group," and no lithic designation is included (ACSN, 1961, 1970; NACSN, 1983, 2005).]
Not synopsized to date.
Idaho Mountains province
For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.
Asterisk (*) indicates usage by the U.S. Geological Survey. Other usages by state geological surveys.
"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 ([ ]).