Chap. III.] sub-himalayan series— sub athu group. 79 



is found resting upon them, as on the other side. We have here the 

 section of a synclinal fold displaying a true bottom rock of the Subathu 

 group : it is shown in Fig. 9. The regularity and simplicity of this 



Fig. 9. 

 S. W. N. E. 



1 %w$ 



Section through ridge at Subathu. b. Slates, d. 3 Numrnulitic beds, 

 little section is in strong contrast with the anomalous conditions that 

 prevail elsewhere, as already described. Along the great bands of these 

 numrnulitic rocks in the valleys to the north-east, I have never observed 

 this peculiar bottom-rock of Subathu ; it is either concealed, or else 

 never existed. This is the more remarkable since I have unmistake- 

 ably identified it on the north of the valleys in a somewhat analogous 

 position to that at Subathu. High upon the south side of the Sairi 

 hills, at the summit of one of the steep slopes where the road changes 

 from the east to the west side of the ridge, one cannot fail to notice an 

 unusual rock ; it is the ferruginous pisolitic bottom clay of the numrnu- 

 litic group ; for a few yards below it, on the hill, there is a remnant 

 seen of the red and gray calcareous clays, the same as occur with it at 

 Subathu ; I have found fossils in this locality, but the rocks are greatly 

 crushed and obscured. The determination of whether or not this bottom- 

 rock is common to the whole intervening area involves some interesting 

 considerations of detail regarding the pre-nummulitic condition of the 



surface, and the process of formation of this group, I suggest it to the 



attention of future observers. 



It will be recollected that in the second Chapter, page 54, I 



described the region of Subathu as one of more than usual obscurity 



among the Lower Himalayan rocks : in so far, therefore, as the evidence 



