Named after Dimple Dell Road. Only two exposures known in report area. The first, which is designated the type locality and is about 7 ft thick, is in bank of Dry Creek, NW1/4 SE1/4 sec 15, T3S, R1E at altitude 4,770 ft, Salt Lake Co; the second is near mouth of Willow Creek about 1 mi east of Jordan River, N1/2 N1/2 sec 25, T3S, R1W, at altitude of about 4,400 ft, Salt Lake Co. Both localities in UT on the Wasatch uplift. Is developed on pre-Lake Bonneville alluvium. Is overlain by Little Cottonwood Formation (new) of Lake Bonneville Group. Is a Pedalfer that lacks calcareous horizon at both exposures along the mountain front. Westward the soil changes to a Pedocal due to decreasing precipitation. A horizon is lacking, probably due to erosion. Of late Pleistocene age. Correlation chart.

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