Usage:
Haystack Mountains Formation of Mesaverde Group (WY*)
Subunits:
(alphabetical): Deep Creek Sandstone Member (WY*), Espy Tongue (WY*), Hatfield Sandstone Member (WY*), O'Brien Spring Sandstone Member (WY*), Tapers Ranch Sandstone Member (WY*).
Geologic age:
Late Cretaceous (Campanian)*
Type section, locality, area and/or origin of name:
Type section: in NE/4 NE/4 sec. 22, NE/4 sec. 23, and SE/4 SE/4 sec. 14, T. 22 N., R. 86 W., Sinclair 7.5-min quadrangle, Carbon Co., WY. Named from Haystack Mountains, in W/2 T. 22 and 23 N., R. 86 W., Carbon Co., WY (Gill and others, 1970).
Reference section: in SE/4 sec. 36, T. 25 N., R. 84 W., Carbon Co., WY (Gill and others, 1970).
AAPG geologic 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 ([ ]).