| Show GIVES ATTENTION TO MINE PRODUCTS Deposits of Rocky Mountain Region Treated in Sur Survey Survey vey Bulletin Bu The increasing interest in the min mineral eral erl era products product of o the western states es especially o those lying in or west west of ot muy be broadly termed the Rocky Mountain region r lon is in the large largo measure of attention given to that region by the geological survey which for tor several years has issued un dor the tho title Contributions tc to Eco Economic Economic Geology tte annual volumes de devoted devoted deVoted voted largely to the mineral resources of ot that part of ot the country The latest volume of ot this thi series seres bulletin bul bulletin letin contains a number of ot valuable n papers discussing gold gol sliver silver siver cement and iron In Colorado gold sliver silver siver cop copper coper copper per er and in Nevada gold and silver in Oregon lead zinc sine and arni Iron in New Nev siver Mexico and marble in Arizona and other lesser deposits and Round Mountain The rhe revival of ot Interest in Nevada in ingold Ingold Ingold gold and silver mines brought about by bythe bythe bythe the discoveries siver at Goldfeld has led to the development of ot other districts two of ot which are in the bulletin The Tho town of ot which lies Hes in county count 26 miles mies southwest of Goldfield is described as a a prom promising pom ising camp cap though when it I was visited only one mine had been developed far farenough farenough farenough enough to ship ore One or two neigh neighboring neighboring neighboring boring mines that were worked forty years ago agog but were vere abandoned on ac account account count of transportation difficulties have now been reopened opened r Round Moun Mountain tain tam another camp described lies les 45 tin miles mUes north of ot Tonopah Only one mine was wa examined in detail and ad Ms is was found to carry oxidized ore averaging 10 0 to 15 to tho the ton The dirt at the foot of ot the south slope of Round Moun Mountain tain was waa being washed by results power with good A large wih number of promising coter cOler mines have been opened at YerIngton in Lyon Lon county Nevada ThOY Tey all al lie le leIn in the ridge close to the town cose and are strung out olt In a chain two miles mUes long Most Moat of or them have shipped some oxidized copper ore but operations are arenow arenow arenow now confined to ores Some Somo of ot them are old mines The deposits of northeast northeastern ern em Nevada are also described The ma material tonal closely resembles a deposit in Oklahoma which has been fully exam examined examIned ined med It looks much like coal oal but is much lighter I in weight These depos deposits its probably cover a wide area but have not Is yet been fully tuly explored Their ex existence exIstence shows that there was once much petroleum in the region but this abl abi escaped long ago owing to the shattering of ot the rocks bY bv geological disturbances Western Oregon Districts Western Oregon has produced con considerable considerable considerable gold and silver siver in past years but the tha th bulletin describes only the Bo Bohemia Bohemia hemia hernia and Cracker Creek districts in which comparatively little lite work Is now in progress The Bohemia district where mining has been done for years Las has ha produced perhaps mainly in free gold Prospecting in the re region region region gion Is carried on rather vigorously nn It Is reasonable to suppose that uther workable deposits will wil sooner or later be b discovered despite despie the dense mass of vegetation that conceals them thom The Cracker Craker Creek district in the Blue Mountain gold belt bel lies les across the tho fa famous famous a Inous Mother lode Only one mine was r reducing at the time It was visited but it was expected that others would soon begin Legun begIn producing The lead deposits at Tres res Hermanas in southern New Mexico have been known for many years and have yield yielded yielded ed about worth of ot metal In InI I lH zinc was discovered in this district and ad 1 shipments wore were made to smelters There are aldo al o indications In of copper in this region The mines of Hanover district in Grant county New Mexico have yielded iron In the ten oer wr u million tons of i since milon they were opened Both hard and soft ores have been extensive 1 h worked but the principal ore is mag magnetite magnette magnetite nette The output of the district distrct is steadily increasing year by year In Arizona is an ore of tungsten and andis andis andis is in proportion to its Is rarity The Tre deposits In Arizona Arzona are in Cochise county Those that th t have been found h bece e been pretty well wel worked out out but others probably exist The ores lie le in granite granie near Its Is contact with schist and andIn andIn andIn In a 1 quartz vein that traverses traverse the granie granite Arizona contains contIns valuable marble deposits which are located In Cochise cot nty In the tho mountains The he marble lies les in thick zones In the strata and is widely distributed One claim Includes Includes n a ledge 75 15 feet feel thick and feet long containing marble that is free from defects The material Is well wel fitted for tor Interior dec dee decorative work and for general architectural architectural tural uses The annual volume containing short papers and preliminary reports report on eco eec economic economic geology to be published during the present year is now in preparation Meanwhile copies of ot tho the last lat volume bulletin may be obtained free of charge by writing to t the director United ratted States geological survey Wash Wasi Washington ington D C CI I |
