182 J. J. STEVEN RON CARBONIFEROUS OF APPALACHIAN BASIN 



at Grafton, a few miles northwest from Webster, it is 250, and at Web- 

 ster it is about 255, assuming the same interval to Lower Freeport as at 

 Valley Falls. At Valley Falls the interval from Lower Freeport to 

 Brookville is only 88 feet, but at Webster it is 102 feet. At the latter 

 locality the sandstone below the Brookville is practically continuous for 

 220 feet, to the bottom of the boring. 



The Allegheny is about 250 feet thick near Morgantown, but the 

 thickness decreases southwardly; on Booth's creek it is 192 plus the in- 

 terval between Brookville and Pottsville; on White Day it is 179; at 

 Valley Falls, 196 feet 7 inches, and at Webster not more than 175 feet, 

 thus showing a loss of at least 75 feet in less than 25 miles. The writer 

 is responsible for the correlations, the local names for the beds being 

 different in many places from those given. The lowest bed on Booth's 

 creek is known locally as the Lower Kittanning and the lowest at Webster 

 as the Lower Freeport. 



It is necessary to give the relations in detail for this area, as it is the 

 critical area for determination of the relations farther south. Within 

 this area one observes the somewhat abrupt change from the Pennsyl- 

 vania section to that of the eastern outcrop in West Virginia. The sec- 

 tion at White Day enables the writer to correct his identification of the 

 Brookville at Webster with the Lower Kittanning in the tentative cor- 

 relation offered in description of the Pottsville section for the eastern 

 outcrop. This correction makes necessary the transfer of the Roaring 

 Creek sandstone to the Pottsville, but it in no wise affects the conclu- 

 sions respecting the Pottsville of the Kanawha area. 



On Deckers and Booths creeks of Monongalia county a dark shale, 

 the Uffington of I. C. White, intervenes between the Upper Freeport coal 

 and the overlying Mahoning sandstone. It is extremely rich in marine 

 fossils and in many ways closely resembles the dark shale associated with 

 the Brush Creek limestone of the Conemaugh.* 



-Ascending the Valley river from Webster, one finds at Moatsville, in 

 Barbour county, the great sandstone of the Webster boring forming bold 

 cliffs with, as at Webster, a variable coal bed at 10 feet above it. This 

 bed, 3 feet thick at Moatsville, is 12 feet 6 inches half a mile away, 

 where it has a sandstone parting 8 feet. The bottom of this Brookville 

 coal bed at Moatsville is 149 feet below the top of a 3-foot coal bed, but 

 at the other locality the interval is 117 feet. The upper bed is the 

 Upper Freeport. At 5 miles southeast from Moatsville a record and 

 boring at the Hall well show the Lower Freeport at 607 feet below the 



* I. C. White: Geology of West Virginia, vol. ia. p. 151 ; vol. ii, pp. 230 and 346, 233, 

 356 and 605, 347, 355. 



