MINERALS COLLECTED. 379 



PART III 



LIST OF MINERALS COLLECTED BY THE SURVEY 

 FROM THE CENTRAL MINERAL REGION. 



The following list of 1 1 1 minerals includes only those which occur as crys- 

 tals or in special or rare situations. It is not complete, but will serve as a 

 preliminary list of localties. The new minerals have not as yet been analyzed, 

 so that it is impossible to describe them at present, but several which seem to 

 be of some interest have been detected in districts like Barringer Hill. A 

 very large amount of material is in the possession of the Survey, and many 

 notes have been taken which have not yet been classified . 



Actinolite. (Amphibole var.) Magnesium-calcium-iron silicate. 



Beautiful pure bladed crystals, in quartz, at King Mountains, Llano 

 County. Riley Mountains, Llano County. From schist area, near Click, 

 Glen, and Sandy gaps. 

 Adularia. (Orthoclase var.) 



Barringer Hill, Llano County. King Mountains, Llano County. Cold 

 Creek, about line of Llano County. Edge of spur south of Kothman's 

 Water Gap. Martin Creek, Mason County. 

 Agate. (Quartz.) Silica. 



Spring Creek, Burnet County. Banded chert and flint in Silurian 

 rocks; also in San Saba and McCulloch counties. 

 Albite. Aluminum-iron-manganese-calcium-sodium-potassium silicate. 



Spring Creek, Burnet County. Clear Creek, Burnet County. Bar- 

 ringer Hill, Llano County. Little Llano Creek, near Lone Grove, Llano 

 County. King Mountains, Llano County (not abundant, but in good 

 crystals). 

 Allanite. Cerium-aluminum-iron-calcium silicate. 



Barringer Hill, Llano County. Mexican diggings, near Babyhead 

 Creek, Llano County. 

 Almandite. Iron-alumina garnet. 



Mexican diggings, Babyhead Creek, Llano County. Clear Creek, 

 Burnet County. Near Shannon's quarries, in Burnet County, in great 

 variety of colors. 

 Amazon Stone. (Orthoclase var.) 



Several localities in Llano County. Not common. 



