Usage:
Needle Siltstone Member of Chainman Shale (NV*,UT*)
Needle Siltstone Member of Woodman Formation (NV*,UT*)
Geologic age:
Mississippian, Early*
Mississippian, Late*
Meramecian*
Type section, locality, area and/or origin of name:
Named from exposures in the Needle Range, southwest UT by Sadlick (1965; 1966), which later authors considered to be type locality (Sandberg and Gutschick, 1980).
Principal reference section designated in Ledger Canyon, Confusion Range, Millard Co., UT (Sandberg and Gutschick, 1980).
AAPG geologic province:
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 ([ ]).