252 M1DDLEMISS: GEOLOGY OF HAZARA AND BLACK MOUNTAIN. 



metamorphic zone. Schists with basic dyke intrusions are most 

 common as far as a little to the west of Kotkai ; after which the 

 granite appears in some fairly thick and many very thin bands, all 

 running parallel to the foliation strike of the schists and of the trap 

 dykes, which are foliated at their margins. 



Notwithstanding this, many examples are to be seen of the dark 

 dykes actually cutting across the edges of the foliation planes of 

 the schists and gneissose-granite, as for instance three miles N. of 

 Goomti, also opposite Ghazikot and Kunhar (see fig. 50). 



Fig- 50. 



Graphitic schists like those mentioned in the Gundgurh range are 

 found on the hill-sides S. of Kotkai, about 1,000 feet above the river- 

 bed, also near Bimbal in the bed of the river associated with crys- 

 talline limestone. 



During our course along this section one is very much impressed 

 by the intricately parallel way in which the schists are banded with 

 thick or thin veins of the granite or of the basic trap. The grey 

 schists, the white granite, and the dark green or black trap form a 

 ' complex' of parallel layers distinctly visible, but far too numerous 

 to be accurately rendered on any map. 



At the junction of the Shal N. with the Indus there are some 

 interesting features shewn in the river section which I will endea- 

 ( 252 ) 



