76 J. J. STEVENSON CARBONIFEROUS OF APPALACHIAN BASIN 



resting on 20 feet of red rock, separating the shale from the underlying- 

 limestone, and the Ferriferous limestone is but 75 feet above the Home- 

 wood. Here all the members below the Mercer shale have disappeared.* 

 The records show a strange condition east from Waynesburg, toward 

 the Monongahela river, for at 2 miles northeast from Wa}mesburg one 

 finds 175 feet of sandstone, beginning at 900 feet below the Pittsburg coal 

 bed, whereas at 2 miles east from Waynesburg there is nothing but shale 

 in that interval, the Lower Carboniferous limestone being reached at 1,107 

 feet below the Pittsburg ; but at 5 miles east from Waynesburg the sand- 

 stone begins at 607 feet below that coal bed and continues to the lime- 

 stone at 1,135 feet, giving a sandstone mass of 528 feet, while at Car- 

 michaels, 4 miles southeast from the last and little more than a mile 

 from the Monongahela, the sandstone begins at 691 feet below the coal, 

 thus : 



Feet 



Sandstone 165 



Shale and "Sheik" 35 



Sandstone , . 180 



in all 380 feet, separated by 10 feet of red rock from the limestone below. 

 The Pottsville is in the bottom sandstone. The same sandstone is found 

 at Willow Tree, about 12 miles southeast from Waynesburg, where, 

 beginning at 840 feet below the Pittsburg, the succession is 



Feet 



Sandstone 50 



Shale 35 



Sandstone . 90 



with 145 feet of red rock below to the place of the limestone at 1,160 feet. 

 The lower sandstone is the Pottsville. The record at the West Virginia 

 line, about 8 miles south -south west from the last, beginning at 892 feet 

 below the Pittsburg, is 



Feet 



Sandstone 55 



Shale and sandstone 85 



with 110 feet of " white sandstone, red rock, and limestone '' underly- 

 ing it.f 



NORTHERN AND WESTERN OUTCROP IN OHIO 



Mahoning county, of Ohio, adjoins Lawrence, of Pennsylvania. Pro- 

 fessor J. S. Newberry studied it during the second geological survey 



*J. F. Carll : 1886 Report, pp. 650, 658. 



| J. F. Carll : Report (I 5), pp. 312, 313, 314, 315, 316, 317. Mr Carll must not be held responsible 

 for the identifications presented in the records quoted from his reports, as the writer has made 

 them on his own responsibility. 



