W. M. Fontaine—Mesozoie Strata of Virginia. 33 
acteristic rocks of the Blue Ridge, some twenty or twenty-five 
miles to the west, and northwest. ey are commonly com- 
posed of a tough epidotic schist, subangular blocks of which, - 
two feet by eighteen inches, and two feet by two and one-half, 
sometimes occur. The most abundant material is a compact 
_ humerous, more or less angular, D banter up to an inch or 
Zoic rocks, and commonly 
ition. here is 
humerous partly rounded and slightly decayed particles of 
a feldspar, with man erfectl h fragmen 
Showing brilliant cleavage faces. These are cemented by a_ 
a felsitic paste into a firm rock, which can only by close inspec-— 
tion be distinguished from granite. It is difficult to see how 
R. steer" Serres, VoL. XVII, No. 97.—Jan., 1879. 
