Lesley.] 



158 



[March", 



close to its southern boundary; and by this branch of the Huntingdon 

 and Bedford line, its railroad distance from Huntingdon would be 57, and 

 from Philadelphia 259 miles. 



Should the B. & D. C. R. R. pass St. Clairsville and reach McKee's 

 Gap (through Dunning's Mountain into Morrison's Cove) 17 miles north 

 of St. Clairsville, the outlet of the ore would be, via Altoona, to Pittsburgh 

 also. 



I. Outcrops of Fossil Ore. — Three cross-sections, marked AB, AC, 

 AD, on the map, show the geological structure along lines diverging 

 west southwest and south, and the steepness or flatness of the ore beds. 



Figs. 2, 3, 4. Representing these sections are reduced to a scale of 2 

 miles to the inch, in photolithographing them. 



Fig. 2. 



il-.CLlir. 



prin l li l «n«A'.'HWIii,|,«IBrai»l 



vyj Attn. 



JWt/f : qjf* yf /it., fio / irutc . 



Fie. 3 



C 4>°-S$* 



Jf.1L. 



Fi<r. 4. 



jy. via. 



HtunUtan UatK 



AB, Fig, 2, 8,000 feet long, passes through St. Clairsville and a gap in 

 Black Oak Ridge, and shows the formations IV, V, VI, VII, and black 

 slates of VIII, all in a vertical posture. 



AC, Fig. 3, 15,000 feet long, shows the formations IV, V, VI, and VII 

 flattened down, so as to spread the ore over the surface of the hill. 



AD, Fig 4, 15,000 feet long, shows the same formations, with the ore 

 dipping at an angle of about 20°. 



