WEST VIRGINIA POCONO 35 



159 feet of sandstone underlie 65 feet of shale and sandstone and rest 

 on 270 feet of Cuyahoga shale. The same condition is found opposite 

 Gallipolis, 12 miles southwest from Letart, where the sandstone beds 

 begin at 10 feet below the Mauch Chunk.* 



Kanawha county is south from Roane. A well at Burning spring, 40 

 miles south from Spencer and somewhat more than 50 miles southwest 

 from Sutton, has no sandstone under the Mauch Chunk (Greenbrier) 

 limestone for more than 1,000 feet, aside from a 2-foot layer at 237 feet, 

 showing the continuance of the shale southward ; but on the Ohio river, 

 at Central City, in Cabell county, 50 miles west from Burning spring 

 and 30 miles south from Gallipolis, the Shenango-Logan is 177 feet, 

 separated from the Mauch Chunk above b}^ 28 feet of shale and resting 

 on 370 feet of Cuyahoga.f 



A well in southern Lincoln county at about 35 miles southwest from 

 the Burning spring and the same distance southeast from Central City, 

 shows no sandstone for 260 feet below the Mauch Chunk limestones. 

 Near Dingess, 10 miles southwest from the last, the more or less sandy 

 red rock observed below the limestone at the Burning spring, as well as 

 in Lincoln county, has become a hard, red sandstone, 94 feet thick, while 

 at 10 miles farther southwest, on the Sandy river, opposite ^^'arfield, 

 Kentucky, only shale underlies the limestone ; so also in another well 

 at a few miles farther south only shale occurs for more than 400 feet 

 below the limestone. The consolidation near Dingess appears to be 

 merely local. J Evidently the area in which the Pocono is represented 

 only by shale is broad and far-reaching southward. 



The eastern outcrops in Tennessee and Alabama. — The Pocono is followed 

 with difficulty by means of lithological characters in the southeasterly 

 outcrops southward from the Virginia line, but the conditions along the 

 edge of the Cumberland plateau become clearer as the outcrop is followed 

 south, for the Pocono is in part the Protean division of Safford's Silicious 

 group. The lower portion of the Pennsylvania Pocono, that below the 

 coal beds in Virginia, decreased rapidly in the southwestern part of that 

 state until it disappeared or was merged into the Grainger shales of M. R. 

 Campbell. 



Details are wanting in northern Tennessee ; Safford's work there was 

 incomplete, and the investigations of the United States geologists have 

 been published in very small part; but midway in the state Mr Hayes 

 describes the lower part of the Great Limestone mass as very cherty, 



* I. C. White: Op. cit. Lewis county, pp. 255, 258; Braxton county, p. 27U; Gilmer county, p. 

 260; Wirt county, p. 262; Roane county, pp. 26i, 268; Jackson county, p. 284; Mason county, pp. 

 274, 282. 



tl. C. White : Op. cit. Kanawha county, p. 272; Cabell county, p. 275. 



tl. C. White : Op. cit. Lincoln county, p. 280 ; Mingo county, pp. 276-279. 



