146 J. J. STEVENSON - — CARBONIFEROUS OP APPALACHIAN BASIN 



interval is filled with red shale which extends downward into the Alle- 

 gheny, ending at 565 feet, "No sandstone is here, but a coal bed is re- 

 ported at 755 feet below the Pittsburg, which seems to be too low for the 

 Brookville, as that coal is at 737 feet in Harrison county far toward the 

 east. Near Harrisonville, about 9 miles south from the Whiskey Run 

 wells, a sandstone 105 to 95 feet thick begins at 585 feet below the as- 

 sumed place of the Pittsburg, and in a well north from the village a great 

 mass of red rock ends at 470, reaching possibly into the Allegheny. 



In the eastern part of the county, south from the Baltimore and Ohio 

 railroad, the sandstones are more distinct, the bottom of the Mahoning 

 being at 461 to 501 feet below the Pittsburg. The first sandstone of the 

 Allegheny begins at 572 to 597 and ends at 603 to 673 feet, while a lower 

 sandstone begins at 719 and is continuous into the Pottsville, if, indeed, 

 it be not wholly in the Pottsville; but a well shows only sandstone from 

 596 to 946 and another from 600 to 1,090 feet, showing the condition 

 already observed locally in other counties. No Allegheny coals are re- 

 ported in any of the wells within the eastern part of the county. In the 

 western part of the county the sandstones are less important, most of the 

 records showing only shales below the Mahoning to many feet down in 

 the Pottsville ; but on the Wood County border a sandstone appears in the 

 lower part of the section, extending from 645 to 720 feet below the Pitts- 

 burg. Near Cairo red shale is present in the upper part of the Allegheny, 

 one well showing a bed of 15 feet at 513 and another showing 13 feet 

 at 524 feet below the Pittsburg. On the western border the top of the 

 Pottsville is approximately 735 feet below the Pittsburg, and there is no 

 evidence of coal in the Allegheny formation. 



Wood county, west from Ritchie, Wirt, and Pleasants, adjoins Wash- 

 ington and Meigs counties of Ohio. The Pittsburg coal bed can not be 

 recognized with certainty and the varying thickness of the Pottsville and 

 Lower Carboniferous render the "Big Lime" a not altogether satis- 

 factory guide. It is best to begin at the north, where the section is clear 

 in its connection with Ohio. 



At Marietta, in Washington county, Ohio, the Brookville is 830 feet 

 above the Berea grit ; at Parkersburg, in Wood county, West Virginia, it 

 is 843 — a very close agreement in view of the fact that the measurements 

 were made by cable and not by steel tape. No other trace of coal appears 

 at Parkersburg. At this place the Brookville is 275 feet below the top 

 of a sandstone, whose upper portion is in the Mahoning interval, this 

 top being 1,125 feet above the Berea. At the Hendershot well, in northern 

 Wood, about 11 miles south from Marietta and 5 or 6 miles east from 

 Parkersburg, the top of this sandstone is 1,111 feet above the Berea. The 



