REPORT OF THE STATE GEOLOGIST. lxvii 



Alice Eay, like that of the Bonanza, is a well defined vein of galena, 

 running from two to eight and ten inches in width. 



There are many other valuable prospects in this district, which are 

 more fully described in the reports. 



Beside the ores of this district, ores are found in districts on the east 

 and south. The Chinati region is, however, the only other one in which 

 much prospecting has been done. Here there are a great many pros- 

 pecting shafts, as well as some well developed mines. The ore on the 

 river side is galena, the outcrops being strongly ferruginous streaks, 

 similar to those of the Quitman Mountains. Some outcrops show car- 

 bonates and sulphides containing both bismuth and silver. An assay 

 of one of these outcrops gave silver ten ounces, bismuth three and five- 

 tenths, lead forty and five-tenths per cent. On the eastern side the con- 

 tacts between the porphyries and crystalline limestones are very clearly 

 marked, and it is on these that the most satisfactory prospecting work 

 has been done. These yield both fine milling silver and galenas. 



In the other ranges examined to the south and east similar ores also 

 exist, but they are at present so difficult of access that little work has 

 been done on them. 



GOLD AND SILVER. 



The precious metals occur in connection with the ores of copper, lead, 

 and zinc, as has already been stated under those heads. They occur 

 also in a free* state. Small amounts of free gold have been found by 

 panning in the Colorado River and in some parts of Llano County, but 

 the amount found is too small for profitable working. Native silver 

 has not yet been reported. In Trans-Pecos Texas, however, the con- 

 ditions are more favorable, and there are two mines now working a 

 free-milling silver ore in Presidio County, and many trial shafts have 

 been put down in the surrounding region. In the Quitman Mountains 

 some of the quartz and ferruginous outcrops show traces of gold, and 

 by using the pan colors of gold are frequently found in the gravel and 

 sand. A small piece of quartz found near Finlay assayed eleven ounces 

 of gold to the ton. Taking this evidence, with the general geologic 

 features of the Quitman and surrounding mountains, the presence of 

 gold is established, although the probable quantity is still uncertain. 

 Free gold has also been observed in certain ores received from Presidio 

 County. 



The best developed mine in this region is generally known as the 



