WEST VIRGINIA POCONO 33 



county, one finds evidence that the Shenango is breaking down, for the 

 sandstone is but 24 feet, with unrecorded rocks for 342 feet below it. 



In southern Ritchie, about 3 miles south from Oxford, the Big Injun 

 is given as 47 feet, while at 12 miles northwest, on the railroad and nearly 

 25 miles west from Long Run, eastern Doddridge, the sandstone is 54 

 feet, with no record below for 347 feet. In north central Ritchie, within 

 the Whiskey Run district, about 5 miles southwest from the Hebron dis- 

 trict, in Tyler county, the sandstone is thinner than in the latter district 

 and much thicker than in southeastern Ritchie, though still much as in 

 northern Doddridge, two wells giving 70 and 73 feet, the Keener being 

 included in both. The records are nearly complete in central Ritchie, 

 near Harrisville and Cairo. Midway between Whiskey run and Cairo 

 the Big Injun is reported as 140 feet, wdth 222 feet of shales below it ; 

 but at Cairo, on the railroad, 4 miles southwest from the last, it is only 

 97 feet, while at Harrisville, 3 miles east from Cairo, it is 102 feet. No 

 records in southwest Ritchie pass through the Shenango, but a record at 

 Burning spring, in Wirt county, 12 miles south-southwest from Cairo' 

 gives the Big Injun as 50 feet, with 385 feet of gra}^ shale below it. This 

 locality is ba,rely 10 miles farther south than is Oxford, in Doddridge 

 county. On the western side of Ritchie, north from the Baltimore and 

 Ohio railroad and not more than 15 miles due north from Burning spring, 

 the Big Injun is given as varying from 121 to 147 feet, in each case rest- 

 ing on a great mass of shale. In the former well the mass is white sand 

 throughout, but in the latter the bottom 34 feet of sandstone is sepa- 

 rated from the upper plate by 14 feet of shale. Doctor White identifies 

 the lower plate with the Squaw. This increase northward accords with 

 the Tyler conditions. 



Passing over into Wood county, one finds in the Hendershot district 

 200 feet of Big Injun, with limestone below it. Doctor White suggests 

 that some of the sandstone may belong to the Pottsville, as the Mauch 

 Chunk is absent westward. Be this as it may, a record obtained a little 

 farther eastward in the same district shows 222 feet of sandstone under- 

 lying the Mauch Chunk and resting on a great mass of shale. At Park- 

 ersburg, on the Ohio, the thickness is 205 feet, with apparently no shale 

 division. At Marietta, on the Ohio side of the river, according to Pro- 

 fessor Orton, the sandstone is 335 feet thick, resting on the Cuyahoga 

 shales ; but much of this sandstone must be referred to the Pottsville, as 

 the Mauch Chunk is absent. At Macksburg, Noble county, Ohio, 20 

 miles north from Marietta, 214 feet of pebbly sandstone overlie the 

 Cuyahoga shales.^ Professor Orton says that the Logan (Shenango) 



*I. C.White: Op. cit. Harrison county, pp. 248-254; Doddridge county, pp. 321-333; Ritchie 

 county, pp. 300-321 ; Wirt county, p. 262 ; Wood county, pp. 2S5-298. 



