172 MIDDLEMISS: GEOLOGY OF HAZARA AND BLACK MOUNTAIN. 



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when a gap in the 

 ridge allows the 

 south-eastern out- 

 crop of the Jura- 

 Cretaceous band to 

 change over from 

 the hill-side facing 

 Bugnotur and to 

 take a northerly 

 direction V-ing 

 down a side-stream 

 towards Nerrian, 

 where it meets the 

 north-western out- 

 crop of that band, 

 after which the two 

 proceed as a single 

 narrow outcrop for 

 about a mile in a 

 north-easterly di- 

 rection and then 

 die out. This is the 

 little fold in the 

 Spiti shales seen 

 to the left hand of 

 the sketch-section 

 (fig. 19) and occu- 

 pying the trough 

 of the left-hand 

 sigmaflexure. This 

 pinched-up fold in 

 the Jurassics is, 

 therefore, all that 

 is left of the wide 



( 172 ) 



