VIRGINIA AND WEST VIRGINIA 437 



Photographed by I. C. Russell 

 8 by 10 inches. Negatives in United States Geological Survey 



1208. Fields of residual clay near Natural bridge, Virginia. Published in Bulletin 



52, United States Geological Survey (No. 39). 



Photographed by H. R. Geiger 

 8 by 10 inches. Negatives in United States Geological Survey 



1209. Arched strata on Chesapeake and Ohio canal, probably near Hancock, West 



Virginia (No. 177). 



1210. Fold in brown sandstone on Chesapeake and Ohio canal, 2 miles above Han- 



cock, West Virginia (No. 175). 



Photographed by N. H. Darton 

 6J by 8J inches. Negatives in United States Geological Survey 



1211. Anticline in Lewistown limestone, South branch of Potomac river near" 



Hopeville, West Virginia (No. 222). 



1212. Anticline and thrust fault in Tuscarora quartzite, Panther gap, Virginia; 



looking south (No. 245). 



1213. Anticline of Tuscarora quartzite, Panther gap ; looking south (No. 251). 



Photographed by J. F. Kemp, Columbia University, New York, New York 

 5 by 7 inches 



1214. Arch of Upper Silurian quartzite forming the " Rainbow," at Iron gate, near 



Clifton forge, Virginia. The arch is exposed in the valley of the James 

 river. Another stratum of quartzite forms a parallel arch higher up, 

 which does not appear, from lack of distance in taking the view. 



1215. Overthrown fold of Upper Silurian quartzite in Eagle mountain, in the valley 



of the James river, Virginia. 



1216. One limb of fold of Upper Silurian quartzite forming Rathole mountain, just 



across the James river from number 1215. 



Washington 



Photographed by B. Willis 

 6} by 8£ inches. Negatives in United States Geological Survey 



1217. Stehekin valley, about 2 miles east of Cascade pass, Cascade range, Wash- 



ington ; showing the profile due to profound erosion followed by glacia- 

 tion (No. 196). 



1218. Cascade pass, Cascade range. Basin at the head of Stehekin east of the pass, 



showing the character of the glacial amphitheaters and the remnants of 

 glaciers (No. 199). 



1219. Cascade pass, Cascade range. View from the summit of the pass, 5,300 feet, 



southward to the headwaters of Cascade river. The high peaks rise to 

 about 8,800 feet (No. 200). 



LXIII— Bur.T,. Geoi,. Soc. Am., Vol. 13, 1901 



