KAMET AND SP1TI. 



223 



Thanam valley (Sutlej river drainage) leads over the entire palaeozoic 

 group down to the crystalline belt (here gneissose rocks). I found 

 the palaeozoics so much altered by great intrusions of granitic rock 

 that I managed only with difficulty to recognize some, though not all, 

 the divisions of it, seen elsewhere. 



, ,.„ From the above sketch of the formations in 



Points or difference 

 with Stoliczka's correla- Spiti, it appears that Stoliczka's views with 

 tiuns. 



regard to them must be modified in the follow- 

 ing points : — 



(1) The silurian closes with the flesh-coloured quartzite series (5) 



and not with the " Muth quartzite" (8), which is carboni- 

 ferous ; already correctly supposed by Oldham. 



(2) The dark limestone (6) may be either lowest carboniferous or 



devonian ; probably the latter. 



(3) The carboniferous is in great force and reaches up into the 



fossiliferous limestone (8, a). 



(4) The black Productus shales (9), the Ruling shales of Stoliczka 



belong structurally to the group of beds which ends with 

 the rhaetic and lias limestones, and they are probably of 

 permian age. 



(5) The middle trias (Muschelkalk ) does not rest immediately on 



carboniferous as Stoliczka thought that it did ; but at Mutli 



at Ruling and other localities in Spiti it rests on beds 



with lower trias fossils, which again are linked through 



the Otoceras passage-beds with the permian Productus 



shales. 



These are, in outline, the main points on which I differ from 



Stoliczka in the interpretation of the Spiti section. There are 



several minor differences which have been noticed in their proper 



places. 



Having established a junction between my own work and 

 Stoliczka's, I retraced my steps from the Sutlej valley to the plains of 

 India, and thus brought to a close, but I hope for a short time only, 

 my researches in the Central Himalayas. 



( 223 ) 



