DESCRIPTIVE GEOLOGY: CRYSTALLINE AND METAMORPHIC ZONE. 247 



Trias. I was unable to satisfy myself whether any of the latter were 

 really present or not. 



The graphitic schists, which have continued in this direction from 

 the south-west end of the range, continue, and form a marked band 

 well seen on the north-west edge of the great limestone mass 

 between Chooeean and Bandee. A good deal of dark trap, in the 

 form of masses intrusive along the bedding, is also found among the 

 graphitic schists and among the limestones (see p. 81). 



As the high crest of the ridge lowers again in a north-easterly 

 direction, the massed limestone bands separate again once more into 

 distinct bands, four of which persist to within 4 or 5 miles of the 

 Dore R. near Thupluh. 



The north-eastern half of the Gundgurh range is much wider 

 than the rest, owing to the appearance of Tanol quartzites in great 

 force south of Mohut. The section from Mohut to Sireekot up the 

 Mohut N., exhibits an enormous thickness of quartzites and quartz- 

 schists, easily recognised as belonging to the Tanols, They are 

 thrown into one immense synclinal with a N. E. — S.W.axis, the dips 

 being as high as 40 or 50 on each side. In the valley N.E. of 

 Choutrai there is a sharp change, and a very schistose conglomerate, 

 much folded and repeated by faults, appears beneath the Tanols and 

 dipping towards the north-west. It is extremely deformed by 

 pressure, and more nearly resembles the Blaini conglomerate of the 

 Simla neighbourhood than anything I have seen. With it is associated a 

 small lenticular band of limestone, doubtless of Infra-Trias age. The 

 same band of limestone may be traced at intervals round that part of 

 the range lying north-west of the Duruh N. It appears west of 

 Umur Khanuh, and again between Sobruh to Mohut in a continuous 

 outcrop parallel to the bank of the Indus R, This limestone does 

 not anywhere pass downwards into purple quartzites, sandstones, 

 shales, and conglomerates, as in the typical Sirban area. On the con- 

 trary, it appears interbedded with white and pink Tanol quartz- 

 ites. At Mohut there are two distinct bands of the limestone as 

 slewn in fig. 49. 



( 2 47 ) 



