ALLEGHENY FORMATION IN WEST VIRGINIA 147 



top of the "Salt sand" at Marietta is 805 feet above the Berea, but at 

 Hendershot the sandstone extends upward to 916 feet, cutting out the 

 Brookville horizon. Southward the "Big Lime" appears and the Logan 

 thickens, so that the intervals to the Berea are increased nearly 200 feet. 

 The Mahoning sandstone ends at 465 feet below the place of the Pitts- 

 burg coal bed and only shales are present below to 841 feet, where the 

 first great sandstone of the Pottsville is reached. Xo trace of the Brook- 

 ville or other coal is here, but three red beds, 25, 40, and 25 feet re- 

 spectively, are in the Alleghen}^ the bottom of the lowest being 650 feet 

 below the assumed place of the Pittsburg. It is possible that the place 

 of that coal bed has been placed too high, and that it may belong 50 

 feet lower, within a great mass of red shale, in which case the first of the 

 red beds would be in the Conemaugh. At a little distance west a deep 

 well shows sandstone 110 feet beginning at 553, and the "Salt sand" 

 begins at 1,020, with an intermediate sand at 713 feet; this is at the 

 top of the Pottsville, and the higher sandstone is one which in part or in 

 whole is followed readily in much of Ohio as occupying the middle of 

 the Allegheny.* 



Returning to the east, the section may be traced across the remaining 

 counties to the Kanawha river and the Chesapeake and Ohio railroad. 



At Vadis, on the Lewis-Gilmer line, a detailed section shows the Ma- 

 honing sandstone ending at 490 feet below the Pittsburg and only shales 

 thence to 715 feet, where begins a sandstone 83 feet thick and evidently 

 in the Pottsville. The condition is as in Harrison county, 15 miles 

 northwest. Five miles southwest, near Troy, in Gilmer county, the same 

 condition appears, except that the sandstone in the Pottsville begins at 

 748 feet. At Glenville, 10 miles southwest from Vadis, the Mahoning 

 ends at 534 and sandstone 80 feet thick begins at 660 feet, reaching into 

 the Pottsville. Near Stouts mills, 8 miles southeast from Glenville, on 

 the Braxton border, the succession is practically all sandstone from 549 

 to 949 feet below the Pittsburg, there being only two interruptions, one 

 of 25 feet at 614 and one of 3 feet at 774, the last being a coal bed which 

 is too low for the Brookville; but at 2 miles northward shale is present 

 for 110 feet above the sandstone at 777 feet, while above the shale is a 

 continuous sandstone into the Conemaugh. Three or four miles east 

 in Braxton county there are only two thin sandstones in the Allegheny, 

 and a coal bed in the upper part is very near the Lower Freeport horizon. 

 At Stumptown, 12 miles southwest from Stouts mills, the lower half 

 of the Allegheny is sandstone, extending to 715 feet below the Pitts- 



* Geology of West Virginia : Ritchie, vol. i, p. 318 ; vol. \a, pp. 410, 412-413, 415, 

 417-419, 420-422, 425-426, 431, 433-435, 439-440 ; Wood, vol. 1, pp. 285, 287, 294-297, 



