106 



SUB-HIMALAYAN ROCKS OF N. W. INDIA. [ClIAP. IV. 





rality, and a higher degree, of disturbance and of upheaval than is found 



in the Sivalik strata. These latter are found 

 »zj }&#/.„ a ^ m ^ny points resting undisturbed against the 



highly inclined beds of the Nahun group, and 

 where, moreover, the supposition of a fault is 

 inadmissible. If, notwithstanding this, we are 

 to find at so short a distance as the outer base 

 of the Sivalik hills the upper group resting in 

 apparent conformity upon the lower one, a very 

 important limitation would be put to our spe- 

 culations upon the nature of the disturbing 

 causes. On the other hand, I must mention 

 that we find in the sections of the Sivalik rocks 

 themselves examples that may be applied 

 retrospectively to sanction such a supposed 

 anomaly. At many places, from a condition of 

 original repose, they are found within a short 

 'H.W/ 13 space turned up to the vertical, or even inverted ; 



thus we are at liberty to suppose a state of 

 disturbance in the Nahun group, prior to the 

 deposition of the Sivalik rocks, similar to that 

 now displayed by this latter group. 



We may now examine how far an original re- 

 lation of these two groups, 

 such as shown in Fig. 11, 

 or supposing, as we must, the disturbance and 

 erosion of the lower strata to have been greater 

 than is there represented, is compatible with the 

 actual sections. The actual section north and 

 south through Nahun is seen in Fig. 12. The 

 generally contrasting stratigraphical features of 



\4 



Actual 

 Nahun. 



section at 



