GENERAL CONSIDERATIONS, 



109 



Except for a narrow band of the sand-rock east of Patli village, 

 and extending as far as the small ridge east of Baidla, there is nothing 

 but Nahan sandstones to the south of the main boundary, the whole 

 of the rest of the way to the Sdrda R. The Nahan zone presents the 

 same characteristics as the Nahan zone south of Naini Tal ; that is to 

 say, it is a great inverted synclinal, with probably lesser folds borne 

 on it. Beds considerably low down in the stage are present at the 

 main boundary, and also along the plain-ward edge of the hills ; 

 whilst softer upper beds of the stage prevail along the central line of 

 the zone. It needs no special description, therefore, and the map- 

 ping will be sufficiently clear by itself. 



CHAPTER V. 

 General Considerations. 



In the preceding chapters we have briefly considered the superfi- 

 ResumS of earlier cial aspects of the country ; we have also made, 

 chapters. as j t we re, a dissection of the rocks from a mi- 



neralogical and petrographical point of view ; subsequently, separate 

 portions of the country have been taken and described as minutely as 

 seemed necessary, with regard to the present disposition of those 

 rocks, the nature of the disturbances which have affected them since 

 deposition, the folds into which they have been thrown, the faults 

 which have supervened, the relations of each of the formations to one 

 another and to the older zones of the Himalayan area, and, lastly, 

 proximate causes have been assigned to account for these folds and 

 dislocations. 



It now remains to consider the rock stages of this region in a 

 wider sense, both in time and space : it is necessary to connect my 

 work with that of other geologists among rocks of the same age and 

 position, and to take a general view of those larger questions in which 

 these rocks are involved in the whole scheme of the Himalaya. 



I must, however, here state that it is not my intention, even if it 

 were in my power, to discuss the whole question of the formation, 



( 167 ) 



