254 



THE IRON ORE DISTRICT OF EAST TEXAS. 



ous parallel fault lines, running east by north and west by south, indicating 

 great latteral pressure from the direction north by west, with an apparent 

 slight upward sliding. The exposure is unequal in the two banks of the 

 stream. In the bank on the eastern side it is covered by about two feet 

 of soil. On the western side it is covered by about six feet of valley drift. 

 The difference is probably the result of a previous erosion of the lignite 

 bed, before the deposition of the valley drift. 



A— 



Fig. 20. 



FAULTED LIGNITE BED, SHELBY COUNTY. 



A. Sandy soil 2 feet. 



B. Lignitic shale 1 foot. 



0. Lignite bed 4 feet. 



Across the southern boundary of Shelby, in Sabine County, the bowlders 

 of siliceous limestone already described as occuring near the top of the hill, 

 and therefore out of their usual horizon, were probably carried upward by a 

 similar sliding motion. 



RELATION OF STRATA. 



The relation of strata in Shelby County is similar to that of Panola County, 

 from Nos. 1 to 19 of the section. 



