Named as a member of Carmel Formation of San Rafael Group for Wiggler Wash, Kane Co, UT in the Plateau sedimentary province. Type section measured 4 mi east of Kodachrome State Park, secs 17, 18, 19, and 20, T38S, R1W. Previously mapped as undifferentiated Winsor or Carmel. Exposed between Grosvenor Arch west to Mill Creek, Kane Co. At type composed predominately of white, green, thin- to thick-bedded, wavy-contorted gypsum in beds alternated with red siltstone, green shale, and sandstone. At type also includes lesser amounts of red, sandy gypsiferous siltstone and thin flat bed limestone where the member is 55.5 ft thick. Is 49 ft thick in Bull Valley, T38S, R4W. Overlies Winsor Member of Carmel; underlies Gunsight Butte Member (new) of Entrada. Assigned to the Late Jurassic. Measured sections. Cross sections.

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