A study of mineral transformations and weathering processes occurring during the genesis of two soils developed from gneiss and schist in Llano County, Texas

Llano County is located in Central Texas and has an area of 942 square miles. In 1960 it had a population of 5,240. The altitude of Llano County ranges from 800 to 2000 feet. The average annual rainfall of the county is 27.59 inches. The mean average temperature is €6^ F.; the average temperature for January and S-olQf are respectively 47° F. and 85° F. Over 90% of the agricultural income is from cattle, sheep and goats, and hogs. Llano County belongs to the land resource area designated as the Central Basin (4l).