MARION COUNTY. 



113 



of brownish yellow sandy clays make a very fair class of ordinary building 

 bricks. These bricks, when burned hard, give a pale gray-spotted brick, and 

 show a considerable amount of shrinkage, chiefly in the air drying. 



There are no permanent brick yards in Jefferson, and the only one in opera- 

 tion is a temporary yard opened to supply bricks for the Lone Star Furnace 

 Company, and when the contract is filled the yard will be closed. 



TABLE SHOWING ANALYSES OF CLAYS FROM JEFFERSON, MARION COUNTY, TEXAS. 



d 

 ft 



1 



CO 



«3 



a 

 S 



< 



a 



o 



t-H 





d 



o 



CO 



a 



fcC 



a5 



a 

 3 



33 



© 



901* 

 902* 

 903* 

 930* 



58.20 

 80.20 

 62.40 

 76.00 



23.97 



12.27 



20.66 



9.45 



4.43 

 1.53 

 8.54 

 4.75 



2.09 

 1.34 

 1.12 

 2.00 



5.02 

 5.11 



7.77 

 4.00 



Trace. 

 Trace. 



Trace. 

 0.40 

 Trace. 



5.36 

 4.70 



99.07 

 100.45 

 100.89 

 100.90 



Dried at 11 5° C. 

 Dried at 11 5° C. 

 Dried at 1 15° C. 

 Bricks. 



Analyses made in the Laboratory of the Geological Survey of Texas by *J. H. Herndon. 



Localities. 

 No. 901. Linden road, one and one-half miles from Jefferson. 

 No. 902. Daingerfield road, one mile from Jefferson. 

 No. 903. A. Richardson headright. 

 No. 930. J. Higgins' yard. 



2. MOULDING SANDS. 



A good moulding sand is more of the texture of a fine clay loam than a 

 sand proper. Many of the brownish yellow sands around Jefferson are in 

 every respect suitable for moulding purposes. The extent of these sands is 

 co-extensive with the brick earths, and the moulding sands generally lie from 

 one to three feet under the surface. 



3. GKEENSAND MARLS. 



In a bluff overlooking Big Cypress, at a place known as the Yankee 

 Camps, and within the corporate limits of Jefferson, there is an exposure of 

 greensand marl having a length of about one hundred and fifty yards and a 

 thickness of about twelve or fourteen feet. This deposit extends from the 

 low water level in the bayou to within four feet of the surface of the bank, 

 and presents a more or less variegated appearance. If found suitable for 

 fertilizing purposes, it has the advantage of being readily accessible at ordi- 

 nary stages of the water level in the bayou. The following is a section of 

 the bluff: 



1. Yellow sand, with ferruginous and quartz pebbles 4 feet. 



2. Thin layer of iron 2 inches. 



3. Ash gray colored sand 2 feet 6 inches. 



4. Black micaceous clay 10 inches. 



