CONEMAUGH FORMATION IN WEST VIRGINIA 213 



trast with Eoane and eastern Jackson, sandstones are present, there 

 being three beds, 44, 38, and 30 feet thick, beginning at 64, 316, and 364 

 feet below the Pittsburg; on the other hand, the reds have diminished to 

 56 feet in three beds, all above the middle of the formation. 



At Letart, in Mason county, 10 miles west from Eavenswood and 10 

 miles southeast from Pomeroy, there is no sandstone in the upper part 

 of the Conemaugh, the only beds being 12, 18, and 50 feet respectively, 

 beginning at 350, 382, and 415 feet below the Pittsburg, the last being 

 in the Mahoning interval.* The reds again become important in the 

 upper half of the formation, there being a mass, 191 feet thick, which 

 begins at 85 feet below the Pittsburg and includes the "Big Bed" of 

 Washington county, Ohio. 



Eeturning now to the east : In Webster, Nicholas, eastern Braxton, and 

 in Clay counties a bold sandstone overlies the Upper Freeport. In north- 

 ern Webster the section extends 180 feet above the Upper Freeport, and 

 deep red shale is shown in the uppermost 40 feet, but in the rest of the 

 section the prominent feature is massive sandstone. At Powell moun- 

 tain, in Nicholas, a massive pebbly sandstone is apparently continuous 

 up to 180 feet above the Upper Freeport. Bold sandstone bluffs are on 

 Elk river below Sutton, in Braxton county, and at Clay Courthouse the 

 succession is: 



Feet 



1. Concealed and much deep red shale 90 



2. Coarse gray pebbly sandstone 60 



3. Concealed and shales, some pale red 100 



4. Massive sandstone, large quartz pebbles 60 



5. Concealed and sandy shale 130 



to the Upper Freeport coal bed. The sandstones are all pebbly and the 

 lowest reds are about 200 feet above the Upper Freeport. In Webster 

 the lowest reds are at 140, so that displacement of shale by sandstone 

 reaches at Clay as far up as at Powell mountain, more than 15 miles east- 

 ward; but the record suggests that the sandstone is not continuously 

 coarse as at Powell, rather that it is broken by sandy shale. Twelve 

 miles below Clay Courthouse the top of "a great massive sandstone" is 

 at 430 feet above the Brookville succeeded by red beds, evidently the 

 same with Number 4 of the Clay section. A well record on the Eoane 

 County border 9 or 10 miles northwest from Clay shows red beds 60 feet, 

 resting on an apparently almost continuous sandstone 330 feet thick, but 

 not reported as containing pebbles. 



* Geology of West Virginia : Gilmer, vol. i, p. 260 ; vol. ia, pp. 384-386 ; vol. ii, pp. 

 243, 388 ; Calhoun, vol. ia, p. 395 ; vol. ii, p. 396 ; Roane, vol. i, p. 264 ; vol. ii, p. 369 ; 

 Jackson, vol. i, pp. 283-284 ; vol. ia, pp. 477-478 ; Mason, vol. i, pp. 281-282. 



