38 STRUCTURE. 



Anticlines. 



Four anticlines, the Arches Fork. Wolf Summit, Chestnut 

 Ridge, and Orlando, appear on the structure map. 



Arches Fork Anticline. The Arches Fork Anticline of 

 Hennen 2 has been previously traced across southern Wetzel, 

 Doddridge, and a corner of Ritchie County, intersecting the 

 Gilmer Line two miles east of Auburn. A supposed continu- 

 ation of this anticline was also traced across Calhoun, on the 

 west, entering Gilmer one-fourth mile southeast of Nobe. The 

 studies carried on by the writer in Gilmer County indicate that 

 the Arches Fork Anticline apparently flattens out against the 

 gradual slope of the Chestnut Ridge Anticline near where it 

 crosses the Gilmer Line from the north and that the anticline 

 on the west, supposed to be the same one, can be traced only 

 about three miles into the county from Nobe, apparently dying 

 out. The connection that may exist between these two ends 

 of the fold is so slight in Gilmer County that it can not be 

 shown on the map. 



Where the short extension of the Arches Fork Anticline 

 enters Gilmer from the west, the Pittsburgh Coal horizon has 

 an elevation of 550 feet and is dipping slightly along the axis 

 toward the northeast. 



Wolf Summit Anticline. The Wolf Summit Anticline of 

 White, described by Hennen in the Doddridge-Harrison Re- 

 port, page 56, enters Lewis County one mile east of the West 

 Fork River, extends southward three and one-half miles to a 

 point one-half mile southeast of Jackson Mill, where it joins 

 the Chestnut Ridge Anticline almost at right angles. At the 

 Lewis-Harrison Line the Pittsburgh Coal has an elevation of 

 1400 feet on the axis of the arch, and at the junction of the two 

 anticlines, the elevation is the same, but there is an interven- 

 ing saddle east of Lightburn, where the coal is only 1375 feet. 

 The fold is decidedly unsymmetrical about its axis, as the coal 

 dips rapidly on the west toward the Robinson Syncline, while 

 on the east there is only a slight dip toward the south end of 



"Ray V. Hennen, Marshall-Wetzel-Tyler Report, W. Va. Geol. Sur- 

 vey, p. 454; 1909. 



