GENERAL SURVEY OF TEXAS WOODLANDS. 



31 



live oak and other species in mixture, growing on rocky,, limestone areas. 

 These thickets cover many square miles north of the Edwards Plateau 

 and arc found in smaller patches of shrub-like character as far west as 

 the Breaks of the Plains. Mountain oak thickets, consisting of a species 

 of oak closely related to the Texas red oak, are found on the tops of 

 mesas and buttes, sides of gorges, and frequently on lesser slopes where 

 they form dense, pure stands of fair quality. The trees are symmetrical 

 and of rapid growth. The wood has a high value for fuel and is 

 adapted to other uses. 



Forest Growth on the Hills of the Edwards Plateau Kerr County. 



The post oak areas do not occur on the limestone formation of the 

 Kd wards Plateau but occupy the sands and gravels of the Carboniferous, 

 formation, the Cross Timbers, the Granitic country, river terraces, and 

 the Lignitic belt already described. Such areas occurring north of the 

 Edwards Plateau are constantly intermingling with the limestone types 

 of timber and in reality represent an associate type of the hill timber. 

 Post and black jack oaks constitute the chief s-pecies, the former being 

 larger and more abundant. In the Llano country and as far south as 

 Fredericksburg, in Gillespie County, quite heavy stands of post oak are 

 common. They increase in abundance northward toward the Cross 

 Timbers and the Carboniferous formation. 



