MOKONGAHELA FORMATION 83 



the other near Farmington, in Marion county, measured by Doctor 

 White, 



Feet Inches Feet Inches 



Waynesburg coal bed.' 7 7 6 



Interval 225 299 9 



Lower Sewickley 6 8 6 4 



Interval 77 4 107 2 



Pittsburg coal bed.... 9 1 9 1 



Totals 325 8 428 4 



showing a remarkable increase in intervals southward; so that at the 

 latter locality, 8 miles west from Fairmont, one has the greatest recorded 

 certain thickness for the Monongahela. At the northern locality the 

 Uniontown limestone, as near Morgantown, in Doctor White's section, is 

 almost continuous with the Benwood, but at the southern it is distinctly 

 separate. The Uniontown coal bed, wanting in the Monongahela core, 

 is present in that from Farmington, where, however, the Eedstone is 

 not present. The sandstones are very pronounced in the Farmington 

 section, and that just below the Waynesburg coal bed is so massive that 

 it is named by Doctor White the Gilboy sandstone. Eed shale, absent 

 in the northern core, is present at Farmington, 5 feet thick at 47 feet 

 below the Uniontown coal bed. 



In Monongalia county the formation thickens westwardly. Some 

 wells about 10 miles west from the river record 330 to 340 feet between 

 the Wa3Tiesburg and Pittsburg and one at 30 miles gives the interval as 

 363 feet, with total thickness of 377. The Lower Sewickley coal bed is 

 present in all the records giving any details. In Marion, along a line 

 passing southwest about 12 miles northwest from Fairmont, the interval 

 from Waynesburg to Pittsburg is 325 near the Monongalia line, but at 

 Mannington, 2 or 3 miles west from Farmington, it is 390 feet. The 

 Lower Sewickley is present in all of the records at 225 to almost 290 

 feet below the Waynesburg, but the Eedstone seldom appears. The Se- 

 wickley sandstone is well marked except near Mannington. As the 

 records are of the ordinary type, they afford no information respecting 

 the limestones. The Waynesburg, Lower Sewickley, and the Pittsburg 

 coals persist to the western border of the county, but records on that side 

 give no information respecting the intervening rocks.* 



Wetzel county, west from Monongalia and Marion and south from 

 Marshall, extends to the Ohio river, where it adjoins southern Monroe 



* I. C. White : Geology of West Virginia. Vol. i, pp. 232, 234, 236, 238, 239, 241, 

 246, 247, 248 ; vol. ia, pp. 163, 164, 165 ; vol. ii, 127, 128, 129. Bulletin U. S. Geol. 

 Survey, no. 65, p. 48. 



J. E. Barnes : Cited in vol. ii, p. 127. 



