Geologic Unit: Wasatch

Usage:

Wasatch Formation (CO*,ID*,MT*,UT*,WY*)
Spelled Wahsatch in some early reports.

Subunits:

(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*).

Geologic age:

early Tertiary (Paleocene to Eocene)*
Locally, can be as old as Late Cretaceous (Maastrichtian) and as young as late Tertiary (Miocene).

Type section, locality, area and/or origin of name:

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).

AAPG geologic province:

Green River basin*
Paradox basin*
Piceance basin*
Plateau sedimentary province*
Powder River basin*
San Juan basin
Uinta basin*
Uinta uplift*
Wasatch uplift*
Yellowstone province