Bisbee daily review., 1903-09-12
IN THE MINING FIELD
Operations of Interest Throughout the County of COchise, Arizona
 and Sonora
and Sonora

found. are of various ages. ranging flcm GambIian through Deyonian and Carboniferous of both the lower and upper series. The limestones rest upon quartzite. which il turn is su- per imposed upon schists. Above the upper Carboniferous limestone
 beds are found the conglomerate in varying thickness, from a few feet to
 500 feet or more, succeeded by thick
 beds of sandstone and shale, while above are beds of CretaceouS lime
 stone of perhaps 600 feet. while top
 ping all are beds of sandstone and
 shale, in places 1000 feet in thickness
 and with eroded surface, so that their
 ciiginal thickness can only be esti'
 mated.
 In addition to the s. ,atigraphic for
 nation previously des ribed. the dis trict has been the scene of gigantic
 labors by all the forces of nature. in
 ages past. The strait, once level,
 have been fexed. dist, rted. elevated
 and faulted, resulting ir the formation
 of the mountains, while il some peri
 cd long past. presumaL y in Carbon
 iferous times. the upliit causing ex-
 tensive faulting. was followed by in-
 trusions of granite magma from the
 depths of the earth, thiG motion rock
 filling the faults and Assures and
 forming the true granite and porphy-
 " rocks of the present day. There
 has been great erosion, for unknown
 ages, and the various beds and masses
 of intrusive rocks are exposed in such
 manner that all of them, from eldest
 D youngest. are to be seen at some
 point in the mountains, and at many
 places the majority of them are in ev-
 idence
 It is evident that the intrusive rocks have played an important part in the naturalization of the district, but just
 how and when is matter on which : the geologists are not all agreed. Roughly speaking. the proven cu-
 uvsH CT the waFFeH district may be called the half of an 5vai. iy- ing title west Of south ef line , drawn through the center of Sacra- mento hill. which Is a very noticeable , hill of darker color than any other in , the district, lying just southeast of . Bisbee. and containing considerable } quantities of iron ore and occasional ) copper. Comparing Sacramento hill X to the pit of a peach cut in half. with { the thin edge of the pit projecting - the mines developed or Gevelopine ? may be said to lie in that quarter of $ the peach lying south and little west . Of lire drawn lengthwise through f the center of the pit Whether cop. , per will be found in the hills north f and e,st Of the lire denoting the de f marcation of the limestone and DOT f phyry" is an open question, but u l date nothing of promise has been dis e covered there. l. IF the northwestern end of the half e the Copper Queen mine, long agC e worked cut, or at least supposed to b, o exhausted. Following to the south E. eastward, come the Czar shaft. thel lt the Hclbrook shaft and finally th' e Spray shaft of the Copper Queer e company Next is the Irish Ma s shaft Of the Calumet & Arizona | after which comes the Lowell shaft O r the Copper Queen These compris' Il the productive shafts of the district D. and may be said to represent the lin T it's of the developed portion of tn y half-oval. Beyond these, but still il
 the golden circle or rather in the cor q hoI fhd Go rdnnr oh f b. of the Copper Queen, the new Senate Is shaft of the Calumet & Arizona. tn ,i- shaft of the Calumet X Pittsbur: C. bCttomed in good ore and the mai 1t shaft of the Lake Superior & Pitts ye burg That all of the last name S. shafts are within the copper circl' in and certain to find ore, is scarcel Is, open to doubt. The lands of th ne Pittsburg & Duluth should also be i an cluded in all likelihood, and the Jun le, ticn Development company officia % believe that they are also safely wit ce in the stopes while the developmen er, al the old Whitehall Deer mine of Il ar- Copper Queen render it reasonab he certain that the Wolverine & AriZol in- is also located within the charm' ut circle The mining properties a Is, icining the properties named are ; pa- believed. by their promoters. to by within the oval. and the Higgins a ex- Calumet & Cochise can make c
 pretty strong cases in support of Il re- contentiol.-Horace J. Stevens. H air. ton Mining Gazette.