Named as lower bed of Laney Member of Green River Formation for exposures along Craven Creek, north of Hams Fork in T21N, R114W, Opal 7 1/2 min quad, Lincoln Co, WY in Greater Green River basin. [These exposures can be inferred to be the type locality.] Is 110 ft thick at type where it is composed predominately of buff, calcareous, silty shale, laminated siltstone and sandstone with occasional interbedded marlstone. The shale is dolomitic with remains of fish, mollusks and ostracodes. Thins south of type. Is 21 ft thick at Little Muddy Creek. Merges east and south with Laney. Intertongues with and overlies Desertion Point Tongue (new) of Wasatch Formation. Underlies and intertongues with Whiskey Butte Bed of Green River. Is of Eocene age. Geologic map. Cross sections.

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