48 BULLETIN 131, UNITED STATES NATIONAL MUSEUM 



BUTTE COUNTY 



B. F. Morrison of Martin, Butte County, has submitted a black 

 highly polished sheared graphitic shale. 



CUSTER COUNTY 



A specimen of graphitic schist containing clean-cut crystalline 

 flakes of graphite has been sent to the National Museum by a cor- 

 respondent in Chains, Idaho. The material is similar to the rock 

 mined for graphite in some localities in the Appalachian States. 

 It is not definitely known that the rock is from Idaho and inquiries 

 regarding it have not been answered. Other specimens sent in for 

 examination by Guy E. Matthews, of Boise, and said to have come 

 from a large ledge near the summit of the Sawtooth Mountains, 

 consist of small hexagonal scales thickly disseminated in quartzite 

 and of reddish black smears on sheared quartz schist. 



CAMAS COUNTY 



A sample of impure fine-grained graphite has been submitted to 

 the Museum for identification by John F. Williams from Fairfield, 

 Camas County. 



IDAHO COUNTY 



Graphitic schists are reported to occur on Salmon River near 

 Grange ville. Analysis of a specimen of the material showed 7.6 per 

 cent of fixed carbon. 6 



SULPHUR (3) 



Sulphur, S. Orthorhombic. 



ADAMS COUNTY 



In the Red Ledge mine, in the Seven Devils district, sulphur occurs 

 in crusts, often 2 centimeters or more thick, mixed with the sul- 

 phates melanterite, pisanite, and chalcanthite. Steep, vertical cliffs 

 of quartz monzonite are stained bright red by hematite and perhaps 

 a little cuprite from the oxidation of pyrite and chalcopyrite dissemi- 

 nated through the rock. Small caves at the base of the cliffs con- 

 tain crusts of soluble sulphates and sulphur, often several centimeters 

 thick, the sulphates having been carried downward by percolating 

 waters from the sulphide-impregnated rock. The sulphur has doubt- 

 less been produced by decomposition of the sulphates. 



BANNOCK COUNTY 



Sulphur in native form occurs abundantly 5 miles east of Soda 

 Springs on the Oregon Short Line Railroad. An attempt was made 

 to work these deposits in the late nineties, and a considerable amount 

 of sulphur was produced in 1901 and 1902, but the plan was aban- 

 doned and the plant was dismantled in 1910. Exploitation was 

 again begun in 1918. The sulphur occurs in connection with a group 



• U. S. Qeol. Survey, Mineral Resources for 1913, pt. 2, p. 199. 



