Named as the basal member of Kelvin Formation for exposures in Parleys and Emigration Canyons, Salt Lake Co, UT on Wasatch uplift. Type section measured along U.S. Route 40, N1/2 SW1/4 sec 8, T1S, R3E where the member overlies Preuss Sandstone and underlies upper member of the Kelvin. Composed primarily of lavender-gray to white to red-brown and friable with white fine-grained limestone as nodules and concretions. Some of the limestone is bedded. Included interbedded tan, brown to brick red, fine- to coarse-grained sandstone, some beds well cemented, others poorly sorted and cross-bedded, dark red brown friable claystone, and conglomerate of pebbles and cobbles of sandstone. Is 157 ft thick at type. Considered to be a prominent white marker whose striking appearance due to scattered beds and nodules of limestone. Lower contact placed at lowest conglomeratic or nodular limestone. Upper contact placed at top of light-colored beds. Formerly assigned to Morrison? Formation by Granger and Sharp (1952). Regarded as medial Early Cretaceous age.

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