22 GEOLOGICAL SURVEY OF ALABAMA. 



position on the face of the bluffs ; and at the Sheffield Gap 

 in S. 9, T. 11 of K 5 E., it is again found at the top of the 

 mountain. 



Crossing the coal field northwestwards to Bristoiv's Cove 

 the Second Conglomerate is again found making the upper 

 part of the bluff on the east side, and extends with the bluff 

 toward the southwest for several miles. This rim of the 

 cove gradually declines in height toward the lower end of 

 the cove, and sinks beneath the surface before reaching the 

 Locust Fork of the Warrior River, and this rock too passes 

 beneath the surface and is not seen again till it rises up in 

 the middle of Straight Mountain near the Tp. line between 

 Tps. 11 and 12 of E. 3, E. From thence it continues promi- 

 nent to the southwestern end of Straight Mountain, as a 

 vertical rock. 



THE THIRD CONGLOMERATE 



Is not a prominent rock, and may not be co-extensive with 

 the coal field. Its place is near the middle of the product- 

 ive measures. It is a coarse dark-colored rock in its upper 

 parts, and near the base a reddish conglomerate formed of 

 good-sized, but not well-rounded pebbles, firmly cemented 

 together with carbonate of iron. Its place can be better ex- 

 plained when it is reached in the description of the coal 

 seams. 



THE FOURTH CONGLOMERATE 



Is among the .upper members of the coal measures in this 

 field. There are but two seams of coal lying above it. It 

 occupies but a small portion of the field, and is only found 

 in a high flat-topped ridge lying between Straight Mountain 

 and Ponch Creek, and the Warrior River below the mouth of 

 Ponch Creek. It underlies the most of sections 17, 18 and 

 19 and part of 8, 9 and 3 of T. 12, E. 3 east. 



The rock in the upper part is light-colored, loosely 

 cemented, weathers badly, and is hence seldom seen on the 

 surface; but its place is plainly shown by a profusion of 



