The Park City Group was designated for Permian strata overlying the Arcturus Formation in the Confusion Range area of western Utah (Hose and Repenning, 1959). The Park City Group is composed of the Kaibab, Plympton and Gerster Formations, in ascending order. The designation has been retained in White Pine and Elko Counties, and is used as a map unit where the three formations cannot be broken out, or in some cases simply have not had the work necessary to break out the individual formation(s) present (Hose and Blake, 1976; Hope and Coats, 1976; Coats, 1985).

Also included with the Park City Group are the Grandeur Formation, which forms the basal portion of the Group in Utah (McKelvey and others, 1959), and the Murdock Mountain Formation (Wardlaw and others, 1979) which overlies the Meade Peak Phosphatic Shale Member of the Phosphoria Formation and is conformably overlain by the Gerster Formation at its type section in the southern Leach Mountains. Both of these units are primarily confined to the Leach Mountains in northeastern Elko County within this evaluation area. Their distribution is poorly understood because of inconsistent assignment of formation names given to lithostratigraphic equivalents in surrounding areas (Coats, 1985). In some cases the Plympton and Gerster Formations, and Murdock Formations have been interchanged or combined, and in other cases the Kaibab and Grandeur Formations are probably interchangeable. With the exception of the Leach Mountains area, the Park City Group is represented by the Kaibab, Plympton and Gerster Formations.

The Park City Group has been mapped within the East Humboldt, Cherry Creek, and Egan Ranges, Wood and Currie Hills, Pequop, southern Goshute, Butte, Dolly Varden and Leach Mountains, Medicine, Maverick Springs, northern Schell Creek, Deep Creek, and southern Antelope Ranges. Individual formations are described below from generally youngest to oldest, with the Kaibab Limestone and Grandeur Formations being laterally equivalent and the Plympton and Murdock Mountain Formation also representing lateral equivalents.