Pg. 29-32, figs. 1-4, 6. Juniper Gulch Member, upper member of Snaky Canyon Formation (new). At type consists of interbedded sandy and cherty, generally light-gray-weathering, thin- to thick-bedded limestone and dolomite. Dolomite makes up about two-thirds of the unit and is more abundant in the upper half. Some beds of sandy, ripple-marked dolomite, dolomite breccia, and conglomeratic (granule) dolomite are present. A medium-dark-gray, oolitic, ledge-forming, dolomite marker bed, 30 feet (9 m) thick, is present about 1,227 feet (374 m) above base. Generally, unit is medium- to light-gray, light olive-gray, and light brown; lower part is thick- to medium-bedded, upper part is thin- to medium-bedded. Light-gray to grayish-black chert makes up about 40 percent of unit in places. Thickness 1,960 feet (597 m) at type. Gradationally overlies Gallagher Peak Sandstone Member of Snaky Canyon Formation (both new); conformably underlies Phosphoria Formation. Age is Late Pennsylvanian to Early Permian (Missourian to Wolfcampian), based on fossils (crinoids, fusulinids, gastropods, brachiopods, bryozoans, solitary and colonial corals, and algae). Authors propose an arbitrary northern limit for the Arco Hills, Bluebird Mountain, and Snaky Canyon Formations at about Lat. 44 deg. 30 min. N.; volcanic rocks along northeast margin of Snake River Plain provide natural southern limit. Report includes correlation chart, measured sections, fossil list, geologic sketch map.
Type section (=type section of Gallagher Peak Member); incomplete, beds overturned: about halfway between Snaky Canyon and Juniper Gulch, in sec. 21, T. 9 N., R. 32 E., [in vicinity of Lat. 44 deg. 05 min. 26 sec. N., Long. 112 deg. 42 min. 22 sec. W.], Snaky Canyon 7.5-min quadrangle, [Targhee National Forest], Clark Co., ID. Named from Juniper Gulch, less than 1 mi south of type section, [Lat. 44 deg. 04 min. 46 sec. N., Long. 112 deg. 42 min. 22 sec. W.], Snaky Canyon 7.5-min quadrangle, [Targhee National Forest], Clark Co., ID. [Lat./Long. coords. from USGS GNIS database and ACME Mapper 2.0, accessed on Darwin's 200th birthday, 2009.]
[Misprint: type section given in US geologic names lexicon (USGS Bull. 1564, p. 86) is incorrect.]

Source: Publication; US geologic names lexicon (USGS Bull. 1564, p. 86); Changes in stratigraphic nomenclature, 1979 (USGS Bull. 1502-A, p. A37-A38).