34 J. J. STEVENSON LOWER CARBONIFEROUS, APPALACHIAN BASIN 



sandstone is usuall}' about 200 feet thick in southeastern Ohio, as shown 

 by well records.^ 



The next tier of counties consists of Lewis and Braxton at the east, 

 Gilmer, Calhoun, Roane, Jackson, and Mason, the last extending along 

 the Ohio river beyond Wood. 



Lewis is south from Harrison. Here are two records, one at the eastern 

 edge at about 25 miles west from the Pocono outcrops in Rich mountain 

 of Randolph county. West Virginia, and the other about 20 miles west 

 on the western line of the count3\ In the eastern well one finds under- 

 lying the greatly thickened Greenbrier (Mauch Chunk) limestone and 

 separated from it by 50 feet of shale, 215 feet of sandstone, which in 

 view of the conditions on Rich mountain must be regarded as the She- 

 nango. At Vadis, on the western edge of the county, the thickness is 

 196 feet, while immediately over the Doddridge line it is 152 feet, con- 

 siderabh^ more than in northern Doddridge, but less than in the south 

 central part of that county. A well bored near Sutton, in Braxton 

 county, 80 miles south-southwest from that in eastern Lewis, shows no 

 sandstone whatever at the Shenango horizon, there being for 800 feet 

 below the Mauch Chunk limestones nothing but shale except 5 feet of 

 sandstone about midw^ay in the mass. Glenville, in Gilmer count3% is 

 10 miles west of south from Vadis, in Lewis county, and 20 miles west 

 of north from Sutton. Evidently no sandstone occurs here below the 

 limestone, for the driller found nothing worthy of record until he had 

 gone 629 feet below it ; so that the conditions here are most probably 

 the same as at Sutton, and very much such as one should expect from 

 the southward decrease of the Shenango in Ritchie county, for at Glen- 

 ville one is about 23 miles south from Oxford, where the Shenango sand- 

 stone is but 47 feet thick. 



No records are given for Calhoun county, the next west from Gilmer; 

 but one ma}^ recall the measurement at Burning spring, northwest from 

 Glenville, where the sandstone is but 50 feet. This locality is 15 miles 

 north from Spencer, in Roane county, which is 30 miles south of west 

 from Glenville. There the sandstone is missing, being either gone or 

 more probably replaced by shale, but at 11 miles southwest from Sj)encer, 

 in the same county, it reapi)ears, clean, white, and 45 feet thick. This 

 locality is about 40 miles west from the Sutton well. The next record 

 is at Ravenswood,t on the Ohio river, in Jackson count}^ where the sand- 

 stone is 147 feet, and the underl3nng shales are more or less sandy. At 

 Letart, on the Ohio, in Mason county, 12 miles west from Ravenswood, 



♦Edward Orton : Ohio Survey reports, vol. vii, p. 3T!i. 



t Ravenswood is 25 miles from Spencer, 30 from Burning spring, and 25 miles west from Parkers- 

 burg. 



