Show Till Til E GRAM I U S ecological ol Survey SUU Issues a I On 0 Wyoming rom InN In Tho Te United geological survey uney hilI recently published a IL of ot the geology and copper coper deposits of at the Iho district Wyoming The Tho author of report r lort which is lb listed listel OH ems Professional Paler Japer No 25 2 is Mr Aithur Al thur C Spencer The Ilio region particularly Investigated Is U nn oMon area embracing about IM w quare mile flues which extends east and amid ost the time north end of ot Park lork range locally called tho the Sierra Madre The town of ot and Ilio tho settle Hettie manic monts at II t Battle Ha ItI I Humbler Copperton Dillon and mire arc tho tue direct outgrowth tim th of interest In iii the miner resources of or this district Encamp Encampment meat ment or Encampment as Ill It wn was originally called II h u tho the tins lint till point It In la situated 43 miles by hy wagon waon road raid from ruin Walcott Wyoming which Is on the tho Union habit ranlo ra nire between I Oo o and fool cot the th P aro lira gradual and amid roads may be bo con coit at 0 t comparatively slight cost n 54 10 Unit that all parts of tho the region mire are can lly liy U accessible The Tho Th report gives the tho result of the 1111 first detailed study undertaken by hy tho the survey of ot the tho rocks rooks In lit Inthe the time Hack locky Mountain region tooth Routh of Montana Three forma tormo and amid an tin older oilIer of oC volcanic are found closely folded together mini Intimately Intruded by dark col coi colored colI ored oreil rocks locally ns Os t argo amounts of or granite mind 11 also occur but theM seldom contain Indications ot of ore oro Tho The best bost oro urn deposits hive hl vo been found round In lii tho the where tho limo copper minerals form a 1 cement In zonee of or rock such ns RI other types of deposits ns nit fissure n euro veins dikes containing Impregnations near contacts and metamorphic CH in that are marked by sil carrying and magnetite Tho jho dark Intrusive rocks are lire regarded ns fiN tho time source of oC most of the copper In its time the oro ore I and Its concentration tion In eins or ore bodies Is 18 to circulating waters Copper In III tie the predominant metal of value although a n few occurrences of ores oros have been noted anti and gold Rold Is found either cither by Itself In III quartz veins or In lit small Pinch P II accompanying other Valuable coal exist 1 and are aro worked for use at nt tt the thu mines lInt and In time tha smelter at Encamp Encampment ment t Present Interest t In the tho region dates traits from the thu discovery In III 1897 ISn of at of quart containing free freo Roll gold but after lie tho deposit was wu located 1000 the tise energy of the tho prospect I hunter wat wa mainly mal Illy directed to a n search for tor copper capper ores orca and amid thus far no paying gold veins oilla have bean beams erod erel Tho The mine for Cor formerly bony merly known knowis as the Is III tho the most Important mine of or time the region Al At Although though It has boon beets producing high grade ore oro 1890 It stilt still contains largo large ore oro reserves which antima the tho pros prosperity prosperity of at the mute millo for tor the tho Immediate fu to fUturo turo tore A reduction plant which has hUI re recently bean beon erected at tit Encampment I Is II Isa IIII isa a II further guarantee of Its 1111 pi prosper prosperA asper ity It A large e part of or the report Is in devoted devot ll to a description of or mutes mines and pros poet It contains several topographic auth geologic maps and the occurrence of oro ore deposits Is in Illustrated fy ty 49 9 dla lla grams which add to the value of tho paper impel It H may Inay bo tie obtained without charge e on application to the director of tho the United States Geological Survey Surey I Washington D C e |