STRATIGRAPHICAL ELEMENTS: CRYSTALLINES, ETC. 6l 



it is reasonable to conclude that rocks of that nature must occur in 



situ somewhere higher up the Indus valley in the direction of the 



Chagarzai country and Swat. 



Even these rocks, Mr. Holland thinks, owe the hornblende to ura- 



litic changes of augite. 



Of chloritic schists I have one example as a band in the gneissose- 



granite a little north of Mansehruh. It occurs in 

 Chloritic schists. 



lenticular layers, through the well-foliated matrix 



of which there are scattered fairly large porphyritic felspar crystals. 



The appearance of this band and others in the vicinity dipping in a 



wavy and puckered way with the foliation of the gneissose-granite is 



as though the matrix of the latter had changed into the soft chloritic 



schist, the porphyritic felspars remaining the same. 



Of schists of a faintly talcose character there is doubtless a wide 

 Talcose and Steatitic distribution in these parts, but in the field it is 

 schists, not easy to work out their boundaries and sepa- 



rate the faintly micaceous schists. 



About j mile south-east of 5,202 feet hill near Burkot in Tanawal 

 the metamorphosed Infra-Trias had been excavated in a small way 

 for steatite, and the finely fissile rock evidently contained a fair pro- 

 portion of the mineral, but in only a rather thin band of a few feet 

 in thickness. 



(4) Bands cf gneissose-granite intrusive among (/) and (j). 



We will now turn our attention to the gneissose-granite which is 



present in the form of intrusive bands among 

 General characters. 



the schistose rocks. These bands are generally 



parallel to the foliation of the rocks among which they lie, and they 

 vary in thickness within very wide limits : a band may be as much 

 as 4 or 5 miles broad with scarcely any interruption, except trap- 

 dykes, or it may be merely the thickness of a finger or even less (as 

 in the cases already briefly referred to in which it has been, as it 

 were, injected into the schists apparently under enormous pressure). 

 Over the greater part of the map of Hazafa the whole of the 

 gneissose-granite and schistose country is represented with one 

 colour. It would have been possible no doubt to have traced out 



( 61 ) 



