106 M1DDLEMISS: PHYSICAL GEOLOGY OF SUB-HIMALAYA. 



The Bag Khola section only differs from the preceding one by 

 having a slightly wider exposure of the Siwalik 

 conglomerate, which is also inverted at its north- 

 ern edge. Nothing could be prettier, however, than the clear view 

 of the folded synclinal obtained in the clean-cut little cliffs ; every step 

 in the process of inversion of the northern limb of the synclinal being 

 well portrayed. 



The view of the rocks of this glen is very nearly coincident with 



Raula Kandlo and that depicted in section XI. The valley opens 



Dharapani gad (72). into the g^ N# near Kichail, among beds of 



Siwalik conglomerate. There is a black carbonaceous layer, about 

 one foot thick, among the latter, near the entrance to the stream. 

 There is no sand-rock to the north, but the Siwalik conglomerate 

 abuts directly against the Nahan band ; the Nahan-Siwalik boundary 

 having obliquely truncated the latter so that it is not visible in the 

 section. The Nahan band to the north, save that it is more contorted 

 than usual, preserves a general resemblance in its main folds to the 

 same zone further east. 



In the sections to follow complexity and added interest set in. 

 Sections south of The reversed fault between the younger Siwa- 

 Kataut1, liks and the Nahans can be seen to be a nearly 



uniform straight east and west line from the Raicila stream to the 

 Pcitkholi Rauli. The main-boundary fault, in like manner, keeps a 

 uniform line nearly parallel with it as far as the Gangolia gid south 

 of Katauti. Furthermore, if these lines be produced in a westerly 

 direction into the Nandhaur, we shall find their representatives as 

 described in the paragraph devoted to that river. The intervening 

 country, however, shews no Nahan sandstone at the surface; every- 

 thing is Siwalik conglomerate as far as, and even beyond, the main 

 boundary. In brief, we have overlap of the Siwalik conglomerate 

 upon the older beds. 



In section XII this is first illustrated. The Siwalik conglomerate 

 in the Sira N. forms the lower bend of a sigmaflexure, broken by 

 a reversed fault to the north of if. The Siwalik conglomerate in the 

 ( 164 ) 



