220 
GEOLOGY OF NORTH CAROLINA. 
The ab we cut shows the relations of the different outcrops to each 
other and to the top igraphy, and also a larger outcrop of another bed 
nearly half a mile northwest. The course of this last bed is marked by 
numerous surface fragments scattered quite widely. The ore, in this case, 
is more compact and less slaty; the inclosing rock is a gray gneissoid 
quartzite. 
The analyses of both these beds are added below : 
Silica, . . . 
Alumina, 
3 
9.10 
6.18 
4 
10.12 
