342 



CENTRAL MINERAL REGION OF TEXAS. 



not much different from that on Beaver Creek tributaries, and no prospect- 

 ing has been done in the region. 



The excavation shown by Mr. Caylor did not exhibit a speck of galena, 

 and I was unable to find any within a mile or two upon either side. Chem- 

 ical tests have failed to reveal more than a trace of this metal in any material 

 collected within many miles of it. A large amount of brown calcite, having 

 the appearance of siderite (iron carbonate), had apparently been taken from 

 the recent excavation. It is very probable that galena occurs in small pock- 

 ets in this, but it is not proper to offer an explanation for what is only hear- 

 say evidence of the occurrence itself. It is at least strange that Mr. Caylor 

 could not show some traces of galena in situ, if he found his specimen there; 

 but I am by no means disposed to doubt his word. If such material occur in 

 these rocks a very little further exploration should make it evident, although 

 directions can not well be given now for such investigations, as the rocks lie 

 in various trends. Some one interested in the property ought to dig and 

 blast in the vicinity of this excavation. 



TABLE I. GOLD, SILVER, COPPER, LEAD. 



Collections by Theo. B. Comstock, unless otherwise noted. Those marked (J), in locality 

 column, were collected by Mr. G. Jermy, Assistant Geologist of this Survey. 



No. 



Locality. 



Material. 



Gold, 



oz. 

 pr ton. 



Silver, 

 pr ton. 



Copper, 

 per 

 cent. 



Lead, 

 per 

 cent. 



Remarks. 



1* 



E.Br. Spring Creek, 

 Burnet County. 



E. of Nigger Head 

 Peak, Burnet 

 County. 



Br. Peters Creek, 

 Burnet County. 



Beaver Creek, Bur- 

 net County. 



H. & T. C. R. R. 

 land, mouth of 

 Yoakum Creek, 

 Llano County. 



H. & T. C. R. R. 

 land, Yoakum 

 Creek, Llano 

 County. 



Yoakum Creek, 

 near head (Mc- 

 Gehee Shaft). 



Head Little Llano 

 Creek, Llano 

 County. 



McGehee diggings, 

 head of Little 

 Llano Creek, 

 Llano County. 



Mexican diggings, 

 Babyhead Creek, 

 Llano County. 



Ferruginous 











Vein in mica schist. 



2* 



Quartz with litho- 

 marge ( Carnat). 



Brittle, reddened 

 quartz. 



Galena i n lime- 

 stone. 



Amphibolyte with 

 malachite. 



Granite charged 

 with malachite. 



Tetrahedrite and 

 malachite. 



Garnet rock with 

 bomite(!) 













3* 











From schist con- 



4* 

 5*f 



6*f 



8* 





Traces. 



2.3 



3.5 



45.6 

 1.3 



0.6 



45.3 



tact. 

 Hand assorted. 



Not assorted. 

 One-fourth mile 



0.2 



12.2 



west of No. 5. 



Selected ore. 



Collected by C. 

 Huppertz. 



9* 





Trace . 



10* 



Quartz 





















