STRATIGRAPHICAL FEATURES. 



79 



the mixture of marine forms {Brachiopods, etc.) with the remains of 

 land plants clearly shows, 



p. Cretaceous group. 



Only in the sections of Hundes north of the Niti pass, and the 

 passes which lead from Hundes to Milam, did I observe beds younger 

 than the Jurassic Spiti shales. The range which forms the watershed 

 between the Ganges drainage and the Sutlej, in that region, and over 

 which several easy passes lead into Hundes, as for instance the Ma 

 Rhi La (16,380'), Shal-Shal pass (16,390'), the Balch Dhura (17,590'), 

 etc., consists chiefly of a series cf strata which rest conformably on 

 the Spiti shales, and though the passage from the latter into the 

 former appears gradual to some extent, yet the character of the beds 

 is so different from the Spiti shales that it is easy to draw the 

 boundaries even at a great distance. I met the rock first in the 

 sections north-east of the Niti pass, in the lower reaches of the Sirkia 

 river near the Tibetan town of Dongpu ; see fig. 11. 



Fig. 1 1. Valley of the Sirkia river in Hundes ; cretaceous rocks. 



( 79 ) 



