46 v>% SUB-HIMALAYAN EOCKS OF N. W. INDIA. [CHAP. II. 



a satisfactory explanation. Indeed, until this special question of the form- 

 ation of the Chor be settled, it would be idle to speculate upon the rela- 

 tion which this bears to the more general one of the Himalaya range at 

 large. The Chor now stands within, or rather at one side of, an area of 

 special elevation : immediately to the east of it the upper rocks of the 

 Himalayan series occupy a wide area in the Lower Himalayan region ; 

 while to the west, at and above the mean elevation of the hills, we find 

 the lower members of the series, although at Simla we found evidence 

 that the upper beds had once existed throughout. A leading question to 

 Lines of intensity of ^ e determined with regard to this area of special 

 disturbance. elevation is : — has it any lines of maximum intensity, 



and where are they ? In the south-west portion of the area there can be 

 very little hesitation in placing such a line near the great fault. The 

 action along this fault seems to have extended with undiminished inten- 

 sity to as far as the confluence of the Giri and the Palar, and in this region 

 it is confronted by the Chor. The features I have described on and about 

 the Chor warrant, I think, the inference that it has been a focus of activity, 

 but it is still an open question whether or no special elevation is involved. 

 The fact that this point is now the highest summit in the district does 

 not affect the reasoning ; it will be evident that this may be due to the 

 action of denudation, — the Chor may in reality have been a focus of 

 depression. In the* absence of recognizable stratified rocks, the question 

 will turn upon the view to be taken of the central granitoid mass, 

 —whether it has resulted from the elevation of a more deeply 

 seated metamorphic rock, or whether it be a simple intrusion, in 

 the more exact meaning of the word, of a more or less plastic rock. 

 In the former case we should have to regard the Chor as a most remark- 

 able instance of special elevation, while in the latter case its special 

 depression might be surmised. The lithological and special structural 

 characters of the granitoid mass are against the probability of its origin 

 from fluid intrusion. The exception on the north-east side to the 



