352 THE ORE DEPOSITS OF 



Stones. Contjlomerates and sandstones, more or less metamor- 

 phosed, form the high ridges which run parallel to the edge of 

 the plateau. Along this boundary fault, these rocks are highly 

 tilted, generall}^ dipping seaward, but sometimes bent back upon 

 themselves. They are also frequently faulted, crushed and cut 

 by trap dikes. In places they give promise of workable deposits 

 of copper, but elsewhere in the district the Carboniferous rocks 

 are apparently barren. These metamorphosed sandstones are 

 succeeded by thick beds of g3'psum and limestone which form 

 the hummocky land. The geological features of the plain and 

 island are comparatively simple. The rocks of these tracts are 

 principally sandstones and shales. Those flooring the plain, dip 

 seaward, while those of the island have a general dip towards 

 the mainland. 



THE l'abimf: ore-bearing schists. 



The principal metalliferous deposits of the district are 

 located in a belt of schists occupying the drainage basin of the 

 L'Abime brook. They are easily accessible from Eastern 

 harbor by road. (See map.) 



The belt consists mainly of serecite, chlorite and hornblende 

 schists, which appear to have been produced by the metamor- 

 phism of an original stratitie 1 series — their plains of foliation 

 being guided by the stratification of the original materials. A 

 definite order of succession can be made out among them and 

 their groups of serecite and other schists traced continuously 

 over long distances. 



The sti'ucture of this area is an extremely complicated one. 

 In the uplifting of granitic masses to the east and west of it, 

 the whole tract was subjected to enormous mechanical move- 

 ments which not only threw its rocks into wave-like folds 

 but dislocated them by reverse faults and cut them into slices 

 by shear and thrust planes. The longitudinal axis of the folds 

 strike approximately N. N. E. aud S. S. W. In the central 

 part of the area they pitch S. S. W. or S., whereas in the 



