366 W. M. Fontaine—Primordial Strata of Virginia. 
that Salling’s Mountain is composed of brown shales, which 
he makes the upper member of his No. I, or Potsdam forma- 
tion e further says that in them the dip i is inverted, or to 
the southeast, the limestones of the Great Valley, i. e., the 
Trenton, Chazy, &e. (his No. IL), passing under them. My 
section not having extended into these strata, 1 can say noth- 
ing concerning their age, except that mats would seem to over- 
lie the Calciferous sandrock, as the nued section above 
Gale extends through the Potadaek: ars to those of the 
alciferous. From this change of dip it appears that in this 
region the break and overturn of strata, which elsewhere ex- 
tends through all the rect adane rocks, is found only in the 
strata overlying the Calciferou 
Some of the strata given in she above be present fea- 
tures of <r senior which must now be noticed. 
west. Thea peared of the dower portion of No. (2), ~~ the 
highly <= 
hey are com -. sed of davcboere -worn particles of quartz 
misaean of all sizes, up to that of a buckshot. The cldegue 
largely predominates, wa is remarkable for its freshness, show- 
ing even in Aetk small particles ce cleavage 8 surfaces 
very soar paste, having the 9 Seon pace = 
