368 CENTRAL MINERAL REGION OF TEXAS. 



So Mr. "Walcott interpreted his observations, and the writer has adopted this 

 view in another part of this Report. 



But, it will be noted that the occurrence of welded inclusions was de- 

 scribed. Many of these appear like syenite blotches, and this view is 

 strengthened by the occurrence of large masses of very similar syenitic granite, 

 apparently of the same trend and age, in Silver Mine Hollow, a branch of 

 Beaver Creek, Burnet County. 



Whatever may be the final conclusion regarding these granites, their texture 

 is well known now. Excepting such exposures as the one just mentioned in 

 Burnet County, there will probably be but little demand for such irregularly 

 patched material, although it is solid and some choice combinations might be 

 secured at cost of much time, labor, and capital. The dark grey granite from 

 Silver Mine Hollow may become especially valuable from its variety in this 

 region, and probably other exposures may be found southward in favorable 

 situations. 



F. THE DIMENSION GRANITES. 



The best of all our sources of granites for general construction, including 

 foundations, superstructures, and the heavier ornamentation, as well as mural 

 and monumental works, is that known as the "Burnet Granite," from the 

 original source of supply in Burnet County. To one wishing to know of its 

 adaptability, durability, and general appearance, the example of its use in the 

 stately edifice— the Capitol — at Austin need only to be given. This type, of 

 which there is an enormous quantity in the Central Region, is undoubtedly to 

 be an incalculable source of future revenue. Although enough has al- 

 ready been quarried to exhaust properties of important proportions, there 

 are thousands of times as much awaiting easy extraction. Many believe 

 that the "Capitol Granite," as the rock is sometimes called, is confined to 

 one large outcrop near Marble Falls, the one from which all the ma- 

 terial for the State Capitol was taken. This is a grave error, for the out- 

 crop extends over an area of nearly one hundred square miles, and there are 

 others further west which cover in all nearly as much more territory. En- 

 chanted Rock and its environs in Llano and Gillespie counties, expose nearly 

 as much, owing to the great height of the peaks, although the horizontal out- 

 crop is less. There is also an area in Mason County, near Katemcy, where 

 about 1000 acres are exposed in a considerable elevation. 



This is probably as well exposed for working as any similar mass in the 

 world, and for many purposes the material is not inferior to some of the best 

 foreign granites. It has a pleasing appearance, whether used "in the rough," 

 dressed, or polished, and it can be quarried in almost any desired form of 

 practically unlimited dimensions. 



