Chap. IV.] nahun and sivalik groups. 



103 



dip, he further conjectures that the highly fossiliferous rocks of the 



lower hills, south of Nahun, are lower members of the same series ; and, 



consistently with this view, accounts for their non-appearance east of 



the Jumna, by the lesser upheaval in that region. In the same paper 



he calls attention to the fact, that in the Nahun region the Sivalik hills 



are united to the greater hills, as affording an opportunity of discovering 



the relations of the two series of rocks ; thus, we must presume, he was 



not aware that the Nahun rocks are uninterruptedly connected with 



rocks that are largely exposed along the foot of the hills to the north of 



the Dehra dun, where they are equally in contact with the older rocks. 



R Strachey in 1851, (Quar. Jour. Geol. Soc, London, Vol. VII.,) 



describing the section south of Naini Tal where 

 E. Strachey, 1851. . 



the Sivaliks are exceedingly ill developed, only the 



topmost conglomerate beds appearing, and where the Nahun group is 

 remarkably well developed, falls back upon the extreme view regarding 

 the latter ; adopting the same opinion as Herbert, that they are of " the 

 Saliferous age, and the extension of the strata containing rock-salt which 

 we find on the same general -line further to the west in the Pun- 

 jab" (? the Mundi salt rock — vide p. 60). We will see that the Naini Tal 

 sandstone also is almost uninterruptedly connected with its equivalent 

 at Nahun. 



Vicary in 1853, (Quar. Jour. Geol. Soc, London, Vol. IX.,) describing 



the section of the Pinjore dun, remarks, that on 

 Vicary, 1853. .. 



the north oi it there occurs sandstone not unlike 



that of the Sivajiks, but that he had never found fossils in it. In his 



section, however, he represents it as normally underlying all the rocks 



of the Kasaoli range. 



In Greenough's general geological map of India there is but one 



colour given to the whole series of rocks from 

 Greenough. 



the Subathu to the Sivalik group. But I con- 

 jecture, from the fact of a separating line being engraved, that the author 



