MINERALS— NON-METALLIC 161 



aud Clark couuty, is roportt'd a deposit c-oiitaining seveu distinct varieties of 

 marble, Creoles, Sinias and Eijyptian blacks and creams, white statuary marble, 

 corrara marble, blue marble, and Georgia white marble. It is reported a good 

 quality of marble is found on Dempsey Creek, Powell county. Marble deposits are 

 reported north of Lothair. Hill comity : also near Town.send, Broadwater county, 

 near Dewey, Beaverhead county, and near Garnet, Granite county. 



FLLOKITE 



Uses — Chiefly as a flux in manufacture of basic open hearth steel. Also 

 as a flux in blast furnaces. Considerable quantity used in manufacture of glass 

 and enameled ware ; in electrolytic refining of antimony and lead ; production of 

 aluminum, and in manufacture of hydrofluoric acid. 



Occurrence — Reported by V. S. G. S. in the Potosi miniug district, 14 miles 

 southwest of Pony, Madison comity. Varies in color remarkably in this district, 

 being purple, green, blue, white or black. Also reported near Mullan Pass, west of 

 Skyline. Lewis and Clark county. 



In 1919, Q.Oio short tons of fluorite were imported into the United States. 



FLLLER'S EARTH. 



Uses — Used for scoiu-ing and cleaning cloth and more extensively for clarifying 

 fats, oils and greases. ?;]xtensively used in refining petroleum. Coarser grades for 

 coar.se pottery, brick, tile and pipe. 



Oct'urrenoe — Reported south of Baker, Fallon county, also in Silver Bow 

 county. 



GRAPHITE 



Uses — Manufacture of crucibles and other refractory products, lubricants, lead 

 pencils, paint, foundry facings, preparation to loosen boiler scale, polish for gun 

 powder, and in electrical work. Largest quantity used in making crucibles, which 

 for this purpose must be of the crystalline variety, with a content of graphitic 

 carbon exceeding So per cent, and free from mica, pyrite and iron oxide. Amor- 

 phous graphite, which can be made in the electric furnace, is suitable for most 

 other uses. 



Occurrence — On ridge between Van Camp Creek and Timber Gulch, near south- 

 west end of the Ruby range, 15 miles southeast of Dillon, Beaverhead county. 

 The U. S. G. S. says development has not proceeded far enough to prove the exist- 

 ence of large deposits, but the prospecting done proves that considerable graphite, 

 all of very high grade, occurs there. In another report says this deposit of the 

 same type as the famous crystalline deposits of Ceylon. One mine producing. Also 

 reported by Rowe three miles from Toston. Broadwater county. 



GYPSUM 



Uses — Wall plaster, gypsum plaster board, tile and bricks, insulating medium, 

 retarder in Portland cement, fertilizer, blackboard crayon, base for paints, filler 

 for cotton and most of the finer grades of paper, as a base for mixing with 

 Paris green and other insecticides. 



Occurrence — Cascade county near Millegan, Riceville, Goodman and Kibbey, in 

 beds 3 to 6 feet thick. Fergus county, along north side of Little Belt moun- 

 tains, around the Big Snowy mountains, encircling small dome near Hanover and 

 probably encircling other structural domes, in beds S to 30 feet thick. In 

 Jefferson county near Lime Spur. Carbon county, field extending from Bridger 

 canyon southeasterly into Wyoming. Little explored. Beds 15 to 20 feet thick. 

 Big Horn county in the Red Valley, west of Lodge Grass Creek, three beds, 

 6, 60 and ,50 feet thick. Madison cf)unty. two beds near Lyon, 10 to 20 feet 

 thick. Park county, near Hunter's Hot Springs, occurs in veins 1 to 5 feet wide. 



