28 GEOLOGICAL SURVEY OF ALABAMA. 



known. Where its outcrop* was first seen in the Gap, on 

 nearly level ground, it was only 10 inches thick. A test pit 

 was sunk 15 feet farther to the south, and in that distance it 

 had increased to 22 inches of solid coal. But the seam 

 being under water, and dipping downwards 8 to the south- 

 east, no farther test could be made at that place. Should it 

 continue to increase in thickness as indicated it will prove a 

 valuable seam of coal. 



From this point all the seams that were known, or could 

 be found, were cut in succession across the Field, at its 

 widest part, or toward the Arch. "Walker Gap, in S. 36, T. 

 13, range 2 east. All the streams running into the Black- 

 burn Fork of the Little Warrior, from both sides, were 

 carefully searched for coal exposures, or indications, and all 

 such found were tested. Then measurements were made 

 across the Field from the top of the Lower Conglomerate at 

 the eastern top of Blount Mountain, as nearly at right 

 angles with the strike as practicable, to ascertain the thick- 

 ness of strata between the respective seams, and the aggre- 

 gate thickness of the coal measures. 



To present the data thus obtained in a concise form, and 

 to give greater clearness to the general description of the 

 seams, a general section of the whole Field is given, includ- 

 ing the upper seams, found only in the basin of the Locust 

 Fork of the Warrior. 



GENERAL SECTION OF THE SUPER-CONG LOM- 

 ERATE MEASRURES. 



Top of Measures Clay, irony shale, soft sand- 

 stone 20 feet. 



(28) COAL, soft, no cap rock 2 feet. 



Shale, irony clay, sand-rock, some pebble. . ..30 feet. 



(27) COAL, the Bynum Seam 4 feet 4 inches. 



The 4th conglomerate and quartzite rocks. . . 80 feet 

 (26) COAL, seam not named; good, bright out- 

 crop 1 foot 8 inches. 



Coarse sand-stone, flaggy 40 feet. 



