Geologic Unit: Wanakah

Usage:

Wanakah Formation of San Rafael Group (AZ*,CO*,NM*,UT*)
Wanakah Formation (NM)

Subunits:

(alphabetical): Beclabito Member (AZ*,NM*,UT*), Bilk Creek Sandstone Member (CO*), Crooked Tree Member (CO), Horse Mesa Member (AZ*,NM*,UT*), Junction Creek Sandstone Member (CO*), Pony Express Limestone Member (CO*), Todilto Limestone Member (AZ*,NM*).

Geologic age:

late Middle Jurassic (Callovian)*

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

Principal reference section (composite): (1) section of Burbank (1930, p. 174) on east side of Uncompahgre Valley, 6 mi north of Ouray, [approx. Lat. 38 deg. 06 min. 45 sec. N., Long. 107 deg. 42 min. 50 sec. W.], Ouray Co., southwestern CO
Named from exposures in Wanakah Mine, Ouray district, [Ouray Co.], southwestern CO (Burbank, 1930).

AAPG geologic province:

Black Mesa basin*
Las Vegas-Raton basin*
Paradox basin*
Piceance basin*
San Juan basin*
San Juan Mountains province*