112 SUB-HIMALAYAN EOCKS OF N. W. INDIA. [CHAP. IV. 



confirmation it affords to the explanation I gave of the relations of the 

 Subathu group to the Krol and Infra- Krol strata is very strong ; the 

 prima facie evidence there being strongly in favour of faulted junctions. 

 We must be cautious, however, not to force this new precedent too far, 

 the more so, as there would seem to be an antecedent probability of the 

 two phenomena appearing together ; an original junction, such as I 

 have shewn to have existed in some of these sections, would surely be 

 influential in pre-determining the position of subsequent vertical dis- 

 placement. There seems especial need to introduce the partial influ- 

 ence of faulting in the case of the main junction of the Nahun group 

 with the Subathu group and with the rocks of the Lower Himalayan 

 series, because the strata in contact are so contrasting, and there is so 

 often the appearance of a quasi-fault rock at the junction ; I think, 

 notwithstanding, that we are called upon to explain such cases as far as 

 possible by the mode of action so clearly indicated in the Tib section. 



Having now explained the grounds upon which the Nahun and Sivalik 

 groups are separable, I will rapidly notice the pecu- 

 of eastern region. liarities of each. A glance at the view either from 



the heights on the north or from the duns on the south is enough to sug- 

 gest that the band of rocks which at Nahun forms so well-marked a step 

 between the Sivalik hills and the outer ridge of the Lower Himalaya is 

 continued along the north side of the duns. Such a view, taken from a 

 moderate elevation on the flanks of Budraj, near the village of Mundresu, 

 and looking westward across the Jumna to the contraction of the Kyarda 

 dun, is represented in Plate II. In some few places there is no distinct 

 flanking ridge, but it is rarely that there is no sec- 

 tion seen to establish the constant presence of this 

 band of rocks at the base of the Lower Himalaya. The Nahun range 

 itself continues undiminished up to the Giri, the narrow transverse gorge 

 of the Batta being only a momentary interruption to it. -Between the 



