Chap. II. ] the Himalayan series. 41 



sections about the Clior, is apparent interstratification ; although here 

 too we have undeniable proof that it is abruptly discontinuous in strike. 

 Almost equal anomalies meet any supposition of the rock being intrusive. 



My examination of this mountain has heen very incomplete. I have however been on all 

 sides of it, in marching from Simla to Masuri by three different routes across its northern and 

 southern flanks, and my observations on those three occasions are sufficient to indicate the 

 general physical features of this hill. The most northerly of these routes is the regular 

 road by Chepal and Deobun, leaving the Clior quite to the south. 



Along the valley of the Giri, from Kot to where the river turns at right angles to the 



eastward, the beds that I have spoken of as the Simla slates 

 Upper valley of Giri river. . , 



or Infra-Bum series are the only rocks seen : this line passes 



right across the base of the Chor on the north-west, and is parallel to the section which I have 



described along the Simla watershed. The rocks are in a state of broken horizontality, 



being occasionally crushed or sharply bent, but on the whole only slightly inclined. In the 



northern part the tendency of this inclination is most markedly eastwards, and in the 



southern it is north-north-east ; in both instances being more or less in the direction of the 



Chor. In following up the valley of the Junkunta (the stream flowing northwards from the 



Chor) this moderate inclination of the strata is preserved, the rocks becoming gradually more 



schistose ; above Mandera there are hornblendic and felspathic schists with intermingled 



graphitic matter, and these are succeeded by garnetiferous mica-schists, more or less 



siliceous. Such are the rocks on the spur crossing from Mandera to Suran, and they there 



have a moderate dip to north-east and east-north-east. At Suran coarsely porphyritic gneiss is 



exposed in the river-bed, I believe in situ; the schists close by are, as elsewhere, only slightly 



inclined, but here the inclination is outwards, — from the mountain : they thus apparently rest 



on the granitoid rock. Again, in crossing the eastern spur from 

 East spur of Chor. 



Suran to Baluk these same schists occur the whole way, and in the 



same slightly disturbed position. Massive limestone appears below Baluk. I can only make 



a faint conjecture as to the identity of the rocks in this section on the north of the Chor 



with the others I have referred to of similar lithological character in the Simla district. The 



ridge of Bulsun and Chcpal, along which the Masuri road runs. 

 Chepal ridge. 



seems to correspond with Mahasu ; the siliceous schists and 



schistose quartzites, having a slight northerly dip, and forming the great precipices on the 

 south face of the ridge, may be the same as the Boileaugunge quartzites fKrol sandstone). 

 If such be the case, we should expect, in going southwards, along the connecting ridge from 

 Chepal to the Chor, to find the Simla slates on the intermediate mountains. In support of this 

 general view we find the Blini limestone and its peculiar conglomerate (or else an exact 

 counterfeit of them) where the road crosses the Tons, about three miles below its con- 

 fluence with the Pabor ; the eastern pier of the swing-bridge rests upon these rocks. This 

 locality is in the line of the general strike on Chepal ridge. 



In the section round the southern flanks of the Chor we meet with rocks similar to those 



on the northern. In the Bajathu, and on the spur to the south 

 South flank of Chor. * 



of it, the slates are little disturbed. Above Ratub the rocks become 

 schistose, still with a low easterly dip. The siliceous mica-schists continue up to Harrata ; 



F 



