416 W. M. Fontaine— Primordial Strata of Virginia. 
Art. XLIV.—On the Primordial Strata of Virginia; by 
Wm. M. Fonraine. 
[Concluded from page 369.] 
Rockfish Gap. 
TuE railroad cuts at this place afford some good exposures of 
the lowest Primordial strata. In the deep cut made for the 
west entrance to the tunnel, the junction of these rocks with 
the massive chloritic argillites, which here form the mass of 
the Blue Ridge, is well shown. The strata are here all inverted, 
equivalents of the highly metamorphosed apnlatiins, No. (1 
of the Balcony Falls section, while (8) is the representative of 
the feldspathic conglomerates and their included shales seen 
there. The conglomerate here presents some very interesting 
points of difference. 
