244 MIDIUEM1SS : CF01.0GY OF HAZARA AND BLACK MOUNTAIN. 



strike (and across the river valley) that they are at or quite near 

 their in situ place. 



Observations by Hira Lai further indicate the persistence of 

 these outcrops of gneissose-granite. He found, near Mohrut and 

 Mehra (beyond Suarbee), large^ quantities of erratics of the rock, one 

 of which was 42 feet in diameter. The blocks here lie in and among 

 the stretches of gravel which hide their proper relations. 



The following diagram, fig. 46, will assist the reader in compre- 

 hending the positions of the so-called erratics and their obviously 

 related positions as parts of intrusive veins. 



A Melirau 



,2/3 



§ 



T&Jtxloolrz 



Szrtuvll. 



'o* 



Fig. 46. 

 The black dots re- 

 present outcrops of 

 the gneissose-granite. 



Thus it is cer- 

 tain from the 

 evidence I have 

 adduced that the 

 so-called erra- 

 tics of the left 

 bank of the Si- 

 run R. are no- 

 thing but the 

 ragged feather- 

 edge of a series 

 of veinsof gneis- 

 sose- granite 

 among the older 

 schistose slates. 



The right bank being a gravel plain, shews no rock in situ whereby the 

 continuation of these veins in a N.N.E. direction could have been 

 followed out in detail. The whole position, on the face of it, is 

 obviou^y a puzzli n g one, and liable to misinterpretation. Nothing 

 but a detailed examination of each occurrence could possibly have 

 given the clue to the right interpretation. 



The point to be borne in mind and the lesson to be learnt are 

 simply this, that a massive coarsely crystalline rock, in weather- 

 ing out of a thin-bedded rock, is extremely liable to be left in the 

 ( 244 ) 



