SUB-HIMALAYAN EOCKS OF N. W. INDIA. [CHAP. II. 



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The most probable explanation, with 



which I am ac- 



Ee verse faults. 



quainted, of reverse 



faults, of which we meet such frequent 

 apparent instances, and on such a grand 

 scale, in these Himalayan sections, produc- 

 ing the superposition of older upon younger 



strata, is that of 



First hypothesis. 



Prof. Rogers (see 

 appendix), in connection with the folded 

 flexures of strata. It is a kindred pheno- 

 menon to that of fan structure, of which 

 so many examples have been observed in 

 the Alps, and other regions of disturbance. 

 The lateral force, which is obviously re- 

 quired for these flexures and inversions 

 of strata, seems competent to produce such 

 faulting ; but this explanation involves, at 

 least in its typical mode of action, the 

 inversion of the beds on one side or the 

 other. In the case of the Dhamun Nag 

 section the low steady dip of the older rock 

 would point to a fault along an anticlinal, 

 thus entailing the inversion of the upper 

 beds on the downthrow side of the fault. 

 But, if the identification of the series be 

 correct, this is apparently not the case ; 

 the thin-bedded, compact, pinkish lime- 

 stone must represent the lower Krol beds,- 

 and they are, to all appearance, in the 

 section north of Malgi and elsewhere along 



