Pg. 2, 33, 36, pls. 4-7. Cub Tongue proposed for the uppermost unit of Lead Bell Shale (new); farther east it is reassigned as Cub Shale Member, lowermost unit of Ute Limestane where two-fold subdivision is possible. Cub Tongue grades into Cub Shale Member to the east on Wasatch uplift. Includes the dark gray to black claystone formerly incorrectly designated the Spence Shale Member of the Ute Limestone. Overlies High Creek Limestone; underlies Bancroft Limestone in the east. [Thickness not stated.] Age is Middle Cambrian; trilobites (ELRATHINA and PERONOPSIS), indicative of BATHYURISCUS-ELRATHINA trilobite assemblage zone, recovered from 25 feet below top of unit at type Lead Bell. (Cub Tongue of Lead Bell Shale and Cub Shale Member of Ute Limestone adopted by the USGS.)
Type locality (of Coulter, 1956, p. 10-11): in sec. 4, T. 16 S., R. 41 E., Preston quadrangle, Franklin Co., ID. Named from development along Maple Creek 2.5 mi west of Cub basin.
Reference cited: Coulter, H.W., 1956, Idaho Bur. Mines and Geol. Pamphlet, no. 107, 48 p.

Source: Publication; Changes in stratigraphic nomenclature, 1972 (USGS Bull. 1394-A, p. A12-A13); US geologic names lexicon (USGS Bull. 1520, p. 76); GNU records (USGS DDS-6; Denver GNULEX).