DUJSTKARD FOEMATION 95 



difierentiated. At Eavenswood this sandstone, coarse and pebbly, is in 

 the river bed, and at Murraysville, 10 miles farther up the river, it has 

 a thin coal bed under it. This sandstone, which passes under the Ohio 

 at Blennerhassett island, 4 miles below Parkersburg, is apparently the 

 same with a sandstone, 15 feet, in the Parkersburg well, 28 miles from 

 Eavenswood, and it apparently becomes unimportant farther north, aa 

 there seems to be no trace of it at Marietta, Ohio.* 



In Mason county, west from Jackson, there is no information available 

 except along the Ohio and Great Kanawha rivers. At Letart falls, 12 

 miles west from Eavenswood, the sandstone is 273 feet above the Pitts- 

 burg, which is worthless, its carbonaceous matter, as at Kenna, being dis- 

 tributed through a great thickness of black slate. It underlies 8 feet of 

 sandstone on which rests a red bed 115 feet thick. Other red beds suc- 

 ceed, but they are not differentiated in the record, until at 213 is another, 

 60 feet thick and extending to the sandstone. At Antiquity, 6 miles be- 

 low Letart falls, the sandstone is 241 feet above the Pittsburg, with the 

 interval mostly concealed; but at 11 miles another section shows the in- 

 terval 250 feet, with several beds of red shale. A massive, somewhat 

 pebbly sandstone, TO feet thick, is separated from the Pittsburg coal bed 

 by 15 feet of plant-bearing shale. Limestone seems to be wholly want- 

 ing, aside from some nodules at 193 feet. 



The Pittsburg coal be.d, as in Ohio, very soon becomes unimportant 

 below Pomeroy, and at Point Pleasant, near the mouth of the Great 

 Kanawha river, it is only 2 feet thick and impure. The decrease con- 

 tinues southeastwardly, for a boring at Arbuckle, 15 miles from the 

 mouth of the river, shows only some coaly slate at its horizon. A coal 

 bed, possibly at a Sewickley place, is 89 feet higher, and at 268 feet is 

 a mass of coal and slate, 3 feet thick, underlying a massive sandstone, 

 which may be the Waynesburg.f 



The Duneard Formation 

 correlatwn 



The Dunkard area is much smaller than that of the Monongahela, 

 embracing little more than 7,000 square miles. It is confined to Wash- 

 ington and Greene counties of Pennsylvania, the western central counties 

 of West Virginia and Belmont, Noble, Monroe, Washington, and Meigs 

 of Ohio. Small outlying areas occur in other counties, but they are 



* I. C. White : Vol. ia, p. 478. Catalogue of West Virginia University, 1883-1884, pp. 

 83, 84. 



1 1. C. White : Vol. i, p. 281 ; vol. ii, pp. 142, 143. Catalogue of West Virginia 

 University, pp. 85, 86, 87. Bull. U. S. Geol. Survey, no. 65, p. 54. 



