380 CENTRAL MINERAL REGION OF TEXAS. 



Amphibole. Magnesium-calcium-iron-aluminum silicate. 



Headwaters of Cold Creek, Llano County. Riley Mountains, Llano 

 County. From schist area, near Click, G-len, and Sandy gaps. 

 Amphibolyte. Amphibole rock. See Actinolite, Asbestus, Hornblende, 

 Tremolite. 



Near Little Llano Creek, on Houston and Texas Central Railroad 

 land, Llano County, occurs with malachite and in places with magnetite. 

 Also from Babyhead Creek region. Headwaters of Cold Creek, Llano 

 County. King Mountains, Llano County (alterations from actinolite). 

 Comanche Creek, three miles west of north from Mason, Mason County. 

 One mile a little north of west from Koochville, on branch of Comanche 

 Creek, Mason County (carries copper stains). Six miles from Llano, on 

 road through Click Gap, Llano County. Honey Creek, Llano County. 

 Andesite. Aluminum-caloium-sodium-potassiuto-magnesium silicate. 



Right bank Little Llano Creek, below Lone Grove, Llano County. 

 Andradite. Calcium-iron-aluminum-magnesium silicate. 



Babyhead Mountains and Babyhead Creek, Llano County. 

 Ankerite. Calcium-magnesium-ferrous carbonate. 



Spring Creek, Burnet County (alteration from calcite). High Point, 

 Burnet County. Near Sutton's, northwest of Long Mountain, Llano 

 County. 

 Apatite. Calcium phosphate. 



High Point, Burnet County. Packsaddle Mountain, Llano County 

 (in some of the greensands of Cambrian age). Small green crystals in 

 quartz, opposite Long Mountain, in Burnet County. 

 Aragonite. Calcium carbonate. 



South of Llano, Llano County. Southeast of Enchanted Rock, Gil- 

 lespie County. Mason and San Saba road, one-fourth mile northeast of 

 Bartons. Hinton Creek, San Saba County. Caylor's diggings, Mason 

 County. 

 Asbestus. A fibrous amphibole or pyroxene. 



Very rare, but occasional in Gillespie County. 

 Azurite. Hydrous copper carbonate. 



Mexican diggings, Babyhead Creek, Llano County. Near Yoakum 

 Creek, Llano County. Miller's mine, Llano County (occurs with epidote 

 and pyroxene). Captain McGehee's property, head of Little Llano 

 Creek. 

 Beryl. Aluminum-glucinum-beryllium silicate. 



Gillespie County, occasionally in large crystals, 



