CHANDI HILLS AND COUNTRY WEST OF MITAWALA S6t. 95 



course of the Paili Rau and the Mitawala sot, shows an abrupt twisting 

 of strike ; so that, by one means or other, the dip comes to be chiefly 

 towards the line of fault. In the Mitawdla sot, about ij miles up 

 stream from the present L£ldhcing-Chila road and near the old one as 

 marked on the map, the Siwalik conglomerate is striking north and 

 south, and the bedding is vertical. 



It needs but a glance to see that this Nahan-Siwalik boundary is of 

 a different nature to that which we have seen in any of the areas de- 

 scribed further east. In many points it resembles the fault running 

 parallel to and west of the Kosi R. It is certainly, as in the latter 

 case, a fault separating gently undulating anticlinals and synclinals 

 from a set of strata which forms but one-half of a much larger and 

 grander flexure in an older rock stage. Again, by the way the differ- 

 ent strata of the U. and M. Siwaliks impinge against it on the 

 west, we see that it is not essentially a fold fault, like the Nahan-Si- 

 walik boundaries we have hitherto examined. Primarily, then, it 

 seems to have been a lateral wrench of the strata, or horizontal dis- 

 placement ; but in later times it would seem to have been influenced 

 by an east and west crushing, which has brought about the sharp in- 

 clinations of the younger beds along the line of fault. 



In joining up my observations on the banks of the Ganges with 



those made by Mr. Medlicott and Mr. Oldham, I 

 The Ganges fault. 



must first say a word or two about the Ganges 



fault. The curving of the axis of the normal anticlinal, as exhibited 



in the SidwcUa s6t, to a more northerly direction as seen near Chandi 



Pahar, favours the belief that it represents the Bhimgoda anticlinal 



of Mr. Medlicott, 1 the axis-fault having died out as stated by him. 



The flat synclinal in the conglomerate of the Ghazir£m-ka-sot I 



would also correlate with the synclinal in the Motichur Rau (60). 



The normal anticlinal at Raiw^la, which as taken by me had an axis 



N.N. W.— S.S.E. (not N.W.— S.E. as taken by Mr. Medlicott) would 



fit in with the similar flexure on the east side of the river up the Sunt 



sot. The flexures, however, are not quite continuous on both sides 



1 Mem. G. S. I., III., p. 123. 



( 153 ) 



