Bisbee daily review., 1905-12-10

all the higher summits of the Brad shaw Range. The city of Prescott is miles north of the northwest corner of the quadrangle, and Jerome, a min ing town, is F miles north of the north east corner. The only settlements in the quadrangle at the time of the survey wer small mining camps and scattered ranches. On the north the Prescott and Eastern railroad enters the quadrangle near the Valverde smelter and terminates at Mayer sta tion. The eastern third of the quad rangle consists largely of low-lying desert land and basaltic mesas.
 That part of the folio in which the mineral resources of the quadrangle are discussed will be of most general interest. They include gold, silver, copper, and iron-ore deposits, build ing and ornamental stones. and unde- veloped bodies of volcanic ash.
 No definite statement of the output of precious metals from this region is possible, but an estimate based on scattered contemporary statisJIcs and on the Mint reports gives an approxi- mate value of 9,500,000, about equally divided between gold and silver. At the time of the survey (lA0D only two or three large mines were actually producing, and the output of the dis trict, chiefly gold, was probably less than $200,000. A number Oi other mines, recently active and of demon strated value, were closed down by reason of litigation or other adverse circumstances.
 The ore deposits of the quadrangle, with few exceptions, are Assure veins of simple structure. The veins may be classified, according 10 the domi- nant values of their contents, into gold, silver, and copper deposits, and have been so indicated on the map in most cases, but the distinction between the classes is not sharp, since all these metals commonly occur together, and their relative amounts may vary wide ly in different portions of single de posit.
 The important mines in the quad rangle are in its northern and western parts, and occur in groups associated in a striking manner with the four intrusive stocks of the Quartz-d;Crita which occupy the basis of Groom and Hassayampa creeks. of Lynx Creek, of Bigbug Creeg and its branches near McCabe, and of Poland Creek near Crown King. Brief descriptions of the veins in these four areas and of the less important outlying veins are given.
 Rich placer deposits formerly existed along most of the streams of the quad rangle, and it is estimated that not | less than million dollars was obtain ed by placer mining up to 1881 At almost exhausted.
 No iron ores of proved value are krown in the quadrangle. Iron ores of possible value were, however, noted at one point On the ridge at the head of Blind Indian Creek, about 2 niles southwest of Bueno, is g EOdy of | schist rich in magnetic. It may be | of very local development, but exami- nation of the whole ridge indicates more or less ferruginous schist for upward of 2 miles north and south of the locality in which the richest sTec- linens were found.
 Near Mayer. on the left bank of Bigbug Creek, is a considerable depos- it of onyx marble. small portions of which are of quality that renders it suitable for a decorative stone. The onyx is extremely variable in color and texture. It is generally white or pale green when fresh, but weathering has produced variations of color which give it most of it's decorative value. I The only permanent stream in the quadrangle is Agua Fria River, which throughout the year contains a mod
 crate amount of water. In the south.
 ern half of the quadrangle desert con
 ditions prevail and water is to be had only at widely scattered points, chiefly from wells. Beyond the small areas of alluvium along the streams, the
 soils of the quadrangle are sparse sDd poor.
 I This folio, which is No. 126 of the
 series, is for sale at 25 cents CODY Application should be made t1 the
 Director of the United States Geolog
 ical Survey, Washington, D. c.