Named in Medicine Bow Mountains, WY as one of six formations of Deep Lake Group (rank revised). Best outcrops are west of Rock Creek Knoll, sec 35, T17N, R79W west of Rock Knoll, Carbon Co; sec 6, T16N, R79W near Trail Creek, Albany Co; T16N, R80W between Dipper and Vagner Lakes, Carbon Co, WY in the Northern Rocky Mountain region. Type section (partial) designated as west of Vagner Lake, SW1/4 sec 1, T16N, R79W where formation is divided into a basal 141 ft thick, poorly sorted diamictite, a middle 197 ft thick marble, and an upper 213 ft thick greenish-gray phyllite and very fine grained, locally cross bedded laminated phyllitic quartzite. The matrix of the diamictite is a coarse-grained subarkose; clasts are white granite, quartzite, mafic schist, and metabasalt that range up to 16 cm in diameter. The middle unit has alternating carbonate and calcareous layers. The type includes only lower Vagner. Contact with the stratigraphically older Cascade Quartzite (new) of the Deep Lake is an unconformity. Upper contact is with Rock Knoll Formation (new) of the Deep Lake. No one outcrop represents the entire formation. Crossbeds and ripple marks locally. May be of glacial marine or tectonic origin. Geologic map; stratigraphic sections. Early Proterozoic age.

Source: GNU records (USGS DDS-6; Denver GNULEX).

Assigned as the upper or fifth formation from base of five formations to the Deep Lake Group of the newly defined Snowy Pass Supergroup in the Medicine Bow Mountains of WY in the Northern Rocky Mountain region. Unconformably overlies Cascade Quartzite of Deep Lake Group. Contact with the younger Rock Knoll Formation is thought to be a thrust fault--the Reservoir Lake fault. Rock Knoll is removed from Deep Lake as its upper formation and reassigned to the Libby Creek Group. Is 120-800 m thick. Correlation chart; geologic map. Correlates with lower part of Bottle Creek Formation (new) of Snowy Pass Group in the Sierra Madre. No longer used in the Sierra Madre. Rocks formerly called Vagner are reassigned to newly named Bottle Creek Formation. Rocks in the Sierra Madre formerly assigned to Vagner Formation are reassigned to newly named Bottle Creek Formation, Copperton Formation (formerly Copperton Quartzite), and the Slaughterhouse Formation in this report. Early Proterozoic age.

Source: GNU records (USGS DDS-6; Denver GNULEX).