494 GEOLOGY OF NORTHWESTERN TEXAS. 



south side, there is an outcrop of the seam at which I made the following sec- 

 tion. Beginning at the top: 



1. Heavy shales 3 feet. 



2. Coal . . 10 inches. 



3. Slate 1 inch. 



4. Coal 2 feet. 



5. Fire clay (base not seen) 8 inches. 



Total 6 feet 7 inches. 



A shaft was put down just before my visit to the place about two hundred 

 yards southeast of this outcrop, but which was partly filled with water. The 

 following section of the shaft was given me by Col. E. H. Graham: 



1. Surface soil 2 feet 6 inches. 



2. Reddish sandstone 8 feet. 



3. "White sandstone 25 feet. 



4. Soapstone 4 feet. 



5. Sandstone 9 inches. 



6. Blue slate 7 feet. 



7. Coal 7 inches. 



8. Slate li inches. 



9. Coal 2 feet 11 inches. 



10. Soapstone ... 11 feet. 



1 1 . Sandstone 1 foot. 



12. Slate 2 feet. 



13. Coal 2 inches. 



14. Slate 3 feet. 



15. Coal 3 inches. 



16. Soapstone 6 feet. 



17. Sandstone .... 5 feet. 



18. Soapstone 5 feet. 



19. Limestone (magnesian) 5 feet 6 inches. 



20. Soapstone 1 foot 1 inch. 



21. Hard blue limestone 8 inches. 



22. Soapstone , 1 foot. 



Total 92 feet 6^ inches. 



About one mile north of this last place and on Colony survey No. 616 is 

 the Lewis Coal Mine. At this place coal has been mined at various times 

 for several years by stripping the dirt off the seam. Below the seam is a bed 

 of blue clay with selenite crystals. Above the coal is a bed of blue clay with 

 nodules of sandstone covered with gypsum crystals. These surroundings are 

 a very marked feature of this seam wherever there is sufficient exposure to 

 show them. The method of mining that has been adopted at this place does 

 not give the best results, as the coal is too near the surface and has been in- 

 jured by being exposed to the weather. 



