94 THE IRON ORE DISTRICT OF EAST TEXAS. 



GREENS AND MARLS. 



Greensand marls are found scattered throughout various places in the 

 county, but these sands are in such an altered condition as not to be of any- 

 practical value. 



At Hughes' Springs and in the surrounding country unaltered greensands 

 have been found in many of the wells. This sand is usually found at depths 

 varying from twenty to thirty feet, and the thickness of the bed ranges from 

 two feet, found in a well on the Joseph Burleson headright, to six feet, found 

 in another well on the same headright, but about two miles distant. Six 

 feet thickness was also found in a well on the E. A. Merchants headright. 

 The position of this sand is seen in the sections already given on page 73. 



The following is an analysis of this sand made in the laboratory of the 

 Survey by J. H. Herndon, Chemist of the Survey: 



Silica 60 . 80 



Iron and alumina 22 . 20 



Lime . 99 



Magnesia 0.72 



Sulphuric acid 2 . 69 



Potash . 66 



Soda 2.90 



Phosphoric acid Trace. 



Loss on ignition 9.50 



100.46 



TIMBER. 



Over the greater portion of the ore region, and in fact over the greater 

 portion of Cass County, there is a dense growth of timber. The larger tim- 

 ber consists chiefly of pine, red and yellow; oak, including the white, red, 

 black jack, post, and pin oaks; some hickory and walnut. These last two 

 are in small quantities and very scattered. In the lower portions of the 

 county and bottom lands the growth is mostly of gam — sweet and black — 

 some holly, and a considerable quantity of cypress. 



The acreage under timber will probably not fall far short of 400,000 acres, 

 and may approximately be apportioned thus: 



Acres. 



Red and yellow pine 266,666 



White oak 40,000 



Red oak 20,000 



Black jack 20,000 



Post and pin oak 20,000 



Cypress, gum, holly, and other trees in scattering lots 33,334 



400,000 



