copper. 337 



trend in a wide belt, extending across the upper part of the drainage area of 

 Wolf Creek and Pecan Creek in Llano County. In this tract, which is 

 merely the westward extension of the Babyhead District, there is even a 

 stronger expression of the ancient uplifts, although it can not be said that 

 subsequent breaks are lacking. A large amount of prospecting has been 

 done here, and although all has been abandoned for the nonce, the owners 

 claim they are not discouraged by what they discovered. There certainly 

 can be no doubt of the occurrence here, as in the main Babyhead District, of 

 valuable copper ores, sometimes carrying silver, but determinations of quan- 

 tity are almost impossible from the indications presented by the flooded 

 workings. The mineral streaks which bear the richest ore are apparently 

 thin, but some of the workings show fair-sized pockets or "swells." Much 

 labor has been expended in places which yield no signs of metalliferous ore, 

 and there are abundant outcrops of barren white quartz following the same 

 course as the veins. Judging from the strike (north 75 degrees west) and 

 the persistence of certain physical features, it is very probable that two, pos- 

 sibly three, mineral belts cross practically the whole of the Babyhead District 

 from Little Llano Creek to the divide between Pecan and Magill creeks. 

 Between these, or perhaps forming part of the same belts, are barren areas 

 which give no signs of anything but quartz or schists. 



Between the Miller and the Hubbard mines, which are on Pecan Creek 

 waters, there is a broad outcrop of white quartz, which shows most plainly 

 eastward between Wolf and Pecan creeks, in the shape of high knolls and 

 dykes. In many respects these resemble the outcrops in the same trends 

 and of the same geologic age at Barringer Hill, on the Colorado River, but 

 the minerals of that locality are not duplicated here, so far as now known. 

 Towards the northern edge of this belt the schists and granites appear, im- 

 pregnated with the copper minerals. Another similar tract runs south of the 

 barren? quartz. A description of some of the old workings on Wolf and 

 Pecan creeks will serve to make the conclusions understood, which are given 

 beyond. 



HOUSTON MINING COMPANY DIGGINGS, WOLF CREEK. 



In the northern ore belt above mentioned a number of test openings have 

 been made, some of which on Wolf Creek show well enough to encourage 

 further exploration. In one place, where Mr. Streeruwitz, of this Survey, 

 formerly worked, there is an abundant staining or impregnation of the gran- 

 itic rock in a streak several feet in width, the enclosed mineral being light 

 green malachite (copper carbonate). It would seem impossible for such a 

 body of this material to occur under such conditions as it exhibits without 

 the existence of important ore bodies in the neighborhood. There is a kind 

 V 



