12 GEOLOGICAL SURVEY OF ALABAMA. 



SUB-DIVISIONS. 



The Locust Fork Basin, begins at its southwest end on the 

 high plateau of land which separates it from the Blackburn 

 Eiver Basin, thence to Blount Mountain on the southeast ; 

 thence with the top of said mountain to Gregory's Gap on 

 the road from Walnut Grove to Attalla, in S. 24, T. 11, E. 4 

 east near the township line between ranges 4 and 5 east ; 

 thence north with said range line to Bristow's Cove. From 

 Bristow's Cove southwestward with the edge of the cove, 

 and the edge of Murphree's Valley to the line between 

 Blount and Etowah counties ; thence south along said line 

 one mile to the top of the ridge north of the Hayse Gap; 

 thence southwestwards along the top of this ridge to its 

 junction with Straight Mountain near the south line of S. 18, 

 T. 12 of E. 3 east ; thence with said mountain to Tail's Gap 

 the beginning point on the Blountsville & Whitney road. 



All this included area is drained by the Locust Fork of 

 the Warrior Eiver and mav be "properly called the Locust 

 Fork Basin. 



The upper, or northeastern end of this field, is a plateau 

 region, drained mainly by Line Creek, and tributaries of 

 Clear Creek, and other streams. It possesses a greater 

 thickness of coal measures than the plateau region lying 

 farther to the northeast, but not so great as the basins to 

 the southwest. It carries several seams of coal that are 

 identical with those in the Locust and Blackburn Eivers 

 basins, and is hence an important portion of this coal field. 



The remaining portion of the field, lying between the 

 northwest boundary of the Locust Fork basin, and the 

 Straight Mountain, is drained into the Calvert Fork of the 

 Little Warrior Eiver. It is a small area, but holds exposed 

 some of the best, and most accessible coal seams in this 

 field, and hence is of much economic importance. 



