CONEMAUGH FORMATION IN WEST VIRGINIA 205 



stone at the last two localities includes the Butler and the Lower Mahon- 

 ing. On the Marshall border a well shows a sandstone 37 feet thick be- 

 ginning at 318 feet, which is at the place of the Cowrun. 



Six red beds are recorded midway in Wetzel, in all 109 feet thick. A 

 double bed begins directly under the Pittsburg coal and three others are 

 in the interval, 166 to 383 feet. The lowest is 25 feet thick, beginning 

 at 443 feet, so" that it extends into the Mahoning interval. 



Passing over into Tyler county, south from Wetzel along the Ohio 

 river, one finds in the northern part of the county the first sandstone at 

 490 to 515 feet below the Pittsburg coal bed. Three miles southwest a 

 double sandstone is at 440 to 480 and the first coal bed is at 704 feet, 

 underlying a great sandstone extending from 529 to 664 feet. The same 

 condition is found in another boring 3 miles farther west, where the first 

 sand is at 437 and the second at 537, while near the Ohio the sands are 

 at 425 and 555 feet. Three miles north in Ohio the sandstones are at 

 430 to 480 and 535 to 685 feet. 



In eastern Wetzel one has reached the area of decreasing intervals. 

 The bottom of the Mahoning there is at most 515 feet below the Pitts- 

 burg, as also in northern Tyler. Westward toward the Ohio river the 

 thickness of the Conemaugh decreases until it is barely 500 feet. The 

 conditions in Monroe county of Ohio amply confirm Doctor White's 

 correlation of the Tyler "Cowrun" sandstone with the Mahoning. The 

 coal bed at 704 feet below the Pittsburg, in Tyler, is the Brookville, at 

 the bottom of the Allegheny. 



In this region and in Pleasants county, west from Tyler along the 

 Ohio river, one finds the condition already noted in description of the 

 Allegheny, the prevalence of sandstone, which in some cases is continuous 

 from the top of the Mahoning interval to the Pottsville. The red beds 

 of Tyler and Pleasants can not be traced readily, as details are given in 

 very few records. Two beds are noted in Tyler, 52 and 6 feet thick, be- 

 ginning at 148 and 294 feet, in all 58 feet thick; but in Pleasants there 

 are 75 feet within the interval 148 to 300, the mass being almost con- 

 tinuous from 80 to 195 feet below the Pittsburg. The only traces of coal 

 in Tyler and Pleasants are at 148 in the former and 345 in the latter, 

 marking the Little Clarksburg and Anderson horizons.* 



Eeturning now to the east, the section may be traced westward 

 through the next tier of counties — Taylor, Harrison, Doddridge, Eitchie, 

 Wirt, and Wood — to the Ohio river opposite Washington county of Ohio. 



* I. C. White : Geology of West Virginia, Wetzel, vol. i, pp. 339, 340-341, 343, 348 ; 

 vol. \a, pp. 176-177, 200-203. 



Tyler: Vol. \a, pp. 241-242, 255-256, 258, 266-267. 

 Pleasants : Vol. \a, pp. 269, 273, 274, 286. 



