Wasatch Formation (CO*,ID*,MT*,UT*,WY*)
Spelled Wahsatch in some early reports.
(alphabetical): Alkali Creek Tongue (WY*), Atwell Gulch Member (CO*), Bullpen Member (WY*), Cathedral Bluffs Tongue (CO*,WY*), Chappo Member (WY*), Cowley Canyon Member (UT), Desertion Point Tongue (WY), Hiawatha Member (CO,UT,WY), Kingsbury Conglomerate Member (WY*), Knight Member (UT,WY), La Barge Member (WY*), Lookout Mountain Conglomerate Member (WY), Molina Member (CO*), Moncrief Member (WY*), New Fork Tongue (WY*), Nightingale Member (WY), Niland Tongue (CO*,WY*), Ramsey Ranch Member (WY*), Red Desert Tongue (WY*), Renegade Tongue (CO*,UT*), Shire Member (CO*), Tunp Member (WY*).
early Tertiary (Paleocene to Eocene)*
Locally, can be as old as Late Cretaceous (Maastrichtian) and as young as late Tertiary (Miocene).
Named from exposures in Echo and Weber Canyons, Wasatch Mountains, UT (US geologic names lexicon, USGS Bull. 896).
Type locality: extends from Carter, WY, to the "Narrows on Weber," 7 mi below Echo City, UT, and 10 to 15 mi east of crest of Wasatch Mountains. Named from Wasatch [Wahsatch] Station on the Union Pacific RR, Summit Co., UT (US geologic names lexicon, USGS Bull. 1200).
Green River basin*
Plateau sedimentary province*
Powder River basin*
San Juan basin
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 ([ ]).