70 SUB-HIMALAYAN ROCKS OF N. Vf. INDIA [CHAP. Ill, 



of the Lower Himalayan rocks. Second, the present boundary of the 



Subathu group seems to have been approximately its original limit 



of deposition. Third, the Lower Himalayan rocks had undergone 



comparatively little disturbance before the deposition of the Subathu 



group. In explaining these views I will adopt the supposition made in 



the preceding Chapter regarding the normal order of succession of 



the older strata. 



The best evidence for the three statements put forward in the last 



r -paraoTaph is found at the very station of Subathu. 

 Denuded surface of l ° r J 



contact : In the many outliers of the nummulitic beds on 



the north-east of Subathu (they are too numerous to be all represented 



in a map on so small a scale), and for the most part along the boundary 



of its main area, the Subathu group is found in contact with Infra-Krol 



and Infra-Blini strata. Still, contortion has so complicated the original 



relations of the two sets of rocks, that direct evidence to prove that the 



sequence between the two formations was not regular is very rarely met 



with. A brief consideration, however, even of a single case, leaves very 



. „ , . T little doubt in the matter. For instance, in the 



interred from general 



condition of outliers; case f either of the outliers shown on the section 



of the Krol (Fig. S), had the nummulitic beds been originally deposited 

 upon an undenuded surface of the Krol group, the faulting necessary to 

 account for their present relative position would be inconceivable, — - 

 long, narrow trough-faults with a throw of 2 or 3,000 feet on either 

 side. The great number of such faults also, and their very close proxi- 

 mity, would add to the improbability of this mode of explanation. The 

 argument is further borne out by the total absence of any direct evidence, 

 such as the occasional appearance of the Krol rocks themselves in these 

 troughs : of this appearance I have not discovered a single instance. 

 Another strong argument against the idea of such faults would be their 

 abrupt termination ; thus, within less than half a mile to the east of the 

 two bands of nummulitic rocks in the valley of the upper Blini, we find 



