zzzzzPg. 148. Pistol Range member of McKelligon formation of El Paso group [author does not capitalize rank terms; however, units are considered formal]. "...For the present, members in the McKelligon Canyon formation [also referred to as McKelligon formation] are only incompletely designated, largely because of a lack of suitable place names. Outcropping just above the Pistol Range along the Scenic Drive is the reef with the MCQUEENOCERAS, and this horizon is named the Pistol Range member. Higher horizons in New Mexico appear too variable to merit member names; besides, we have been hard put to it to find enough unused place names as it is." Age is Early Ordovician (middle Canadian; Jeffersonian). Canadian treated as a system in this report. Author states that his philosophy of nomenclature is contrary to "the present fashion of delimiting formations on lithology alone." The resulting proposed divisions of the El Paso Group are thus "a succession of strata and faunas."
Type locality not designated. Named from exposures just above the Pistol Range along the Scenic Drive [northeast of El Paso, El Paso Co., [TX], in the Orogrande basin].

Source: US geologic names lexicon (USGS Bull. 1350, p. 582); GNU records (USGS DDS-6; Denver GNULEX).