94 SUB-HIMALAYAN ROCKS OF N. W. INDIA. [CHAP. Ill, 



It is of more significance for the point I wish now to establish to mention 



or inliers of the lower that Z haVe lieVer Seen an ^ traCe ° f the Kasaoli 

 oue- beds weathering out from beneath the newer 



rocks to the south, where these have been much disturbed and denuded.. 



We do find, among the strata of the middle band, individual rocks undis- 



tinguishable from some in the Subathu group,- — such are some hard 



purple sandstones and clays that may be seen south of the nummulitic 



beds at Kalka, or on the road between Kudi and Budi; yet if the 



connected sections be compared this surmise is not confirmed, no one 



would, I think, in the section of the Sursula identify any portion of 



the band of rocks, south of the nummulitic clays, with any to the north 



of them, although individual rocks may be undistinguishable. The 



important question to be settled is, — should we at any depth find the 



Subathu beds beneath those of the Nahun group 1 

 Statement of the case. 



i. e., were these latter deposited upon a surface of 



the former, whether denuded or not, their actual relative positions, as 



seen at the surface, being due to a great fault ; or, is the actual boundary 



a line carved originally by denudation (along a coast) out of the 



upraised area of the Subathu rocks, and along which the Nahun 



beds were deposited ? I am strongly in favour of the latter view ; it 



does not preclude the supposition of subsequent shifting along this 



line. 



However or whenever the present relative elevation of the Subathu 



over the Nahun groups was produced, it was unequal, — vanishing to the 



detected it until I got your letter. I surely never said that Subathu was built upon anything 

 bearing the most remote likeness to conglomerates. I never said or wrote anything of the 

 kind, and never alluded to conglomerates at all." He further explains that Allea Bukhan, a 

 locality given by D'Aichiac as in the neighbourhood of Subathu, is several hundred miles 'off 

 towards the Indus, near Eawul-pindi. It is evident that the whole mistake, like so many 

 others of the same kind, is traceable to the incorrigible carelessness of unscientific collectors 

 in distinguishing localities when labelling their specimens. Geologists and Paleontologists 

 ought by this time to be sufficiently warned on this point to be more cautious in speculating 

 upon such data. 



