1865.] 



45 



[Lesley. 



spring issues, as shown in Fig. 9 ; it formerly oozed from x. 

 The whole lower, shadowed, or overhung portion of the rock, 

 in Fig. 8, exudes oil from its false-bedding joints, as if these 

 surfaces had received and preserved an extra quantity of the 

 organic matter. 



The Conglomerate is, however, still more irregular in the 

 thickness of the whole mass, as was demonstrated on a large 

 scale in 1857 and '8, by Joseph Lesley's survey of the west 

 edge of the coal area, from the Ohio River to the Tennessee 

 State line. He carefully measured the thickness of the sand- 

 rock No. XII, and the shales below it. No, XI, in every 

 county through wdiich the survey passed. On the Ohio River, 

 XII is 90 feet thick, over a few shales, with a thin coal-bed. 

 On the North Fork of Licking, XII is 150 feet thick, over 

 only 8 feet of shales, " with a well-defined bed of iron ore 

 and a foot of coal." On Miner's Fork, 148 feet of XII lies 

 directly on the limestone. In Estill County, XII is 196 

 feet, over 50 feet of XI shales, with a workable ore-bed and 

 27 inches of coal. At Standing Rock, XII is 210 feet, over 



Fiir. 8. 



li' Piv'iat Vn:k K.Ky ''tr^:^ 



50 feet of XL From this on, southAvards, XII is never over 

 80 feet thick, while the XI shales increase to 225 feet, with 

 two workable and three thin coal-beds, with three distinct ore 



