Named as the upper formation of the Bisbee Group for Johnny Bull Mine in Hidalgo Co, NM in Pedregosa basin. Type section in SE1/4 sec 4, T25S, R21W. Measured section in SW1/4 sec 4, T25S, R21W described. Geologic map included. Is made up of interbedded orthoquartzite, brown subgraywacke, and brown shale. Sandstone constitutes most of formation. Many of the beds are well indurated and thick, and form resistant ledges. Others are thin, argillaceous, and less resistant. Color of the sandstone ranges from white to gray and pink and brown. No complete section preserved but at least 1,047 ft thick at one locality. Rests conformably on Still Ridge formation. No information about upper contact. Is of Early Cretaceous (Albian and Cenomanian) age. No fossils found.

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

Is formation of Gillerman (1958) in central Peloncillo Mountains, Hidalgo Co, AZ in Pedregosa basin. Overlies Still Ridge Formation (Lower Cretaceous) of Bisbee Group with apparently conformable contact. Thickness more than 1,000 ft. Possible correlation with Fort Crittenden Formation (Upper Cretaceous) on basis of lithology. Age changed from Early Cretaceous (Gillerman, 1958) to possible late Late Cretaceous on basis of correlation. Is not considered part of Bisbee Group (Lower Cretaceous) due to age change. [See fig. 5 for regional correlation.]

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

Is top formation in Bisbee Group in central Peloncillo Mountains, Hidalgo Co, NM in Pedregosa basin. Mapped as a single map unit with underlying Still Ridge Formation. Is intruded by units of Tertiary and Tertiary or Cretaceous age. Combined thickness of Still Ridge and Johnny Bull is 250-350 m. Is Early Cretaceous age on basis of stratigraphic position dating.

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

Formation names of the Lower Cretaceous Bisbee Group used in Bisbee area (Glance Conglomerate, Morita Formation, Mural Limestone, and Cintura Formation) can be distinguished in Peloncillo Mountains (Cochise Co, AZ and Hidalgo Co, NM in Basin-and-Range province and in Pedregosa basin. Are recognized for the first time in northern Animas Mountains. Formation names of Bisbee area were defined by Ransome in 1904 and take precedence over local terminologies defined later (Gillerman, 1958, whose names McGhee Peak Formation, Johnny Bull Sandstone, Still Ridge Formation, and Carbonate Hill Limestone are not used in this report).

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