BAXA SERIES. OO 



A fine section is well exposed in the Titi naddi, which includes 

 (ascending as usual) — 



Feet. 



(a). — Green and red*slates ... ... ... 500 



f^.— Slates with flaggy silicious and calcareous layers ... 800 

 (c). — White quartzite, including hands of quartz flags and 



quartz schist ... ... ... ... 1,000 



(d). — Green, hlack, and red slates, with hands of flaggy 

 quartzite ; also of chloritic schist, and flaggy cal- 

 careous beds near the top ... ... • ... 1,500 



fo).— Dolomite, with interbanded layers of dark-grey slate... 1,500 



(f). — Dark-grey slates ; pyritous and rusty in places ... 300 



The thicknesses given are merely eye-estimates : throughout there is 

 a tolerably steady dip between north and north 30 p east, at about 60°. 



Hauri hill is formed of the main quartzite (c) 3 and that to the north 

 of it of the dolomite. Near Londoin hill the last mentioned rock is 

 thrown to the south-east by a fault, and thence forms a lofty rocky 

 ridge as far as the Tursa, but no trace of the dolomite is visible on the east 

 side of the river. There may be a fault, as suggested by Major Godwin- 

 Austen,* but I am more inclined to think that the dolomite band turns 

 sharply round at the end of the ridge, from south-west — north-east to 

 north — south, and thus disappears below the alluvium. 



The rocks on the left side of the river, are green and red slates with 

 layers of quartzite and calcareous flags, &c, and some of dark -grey, slaty 

 rock, in which the surfaces of the beds are blackened by carbonaceous 

 matter. The Bhutanese Subah of Balla sent a man, who pointed out the 

 locality from which the steatite mentioned by Major Godwin-Austenf 

 came. It was, I was told, obtained loose in the ravine at Balla, but 

 none is found now, and the rock had never been traced in situ. It is no 



* Journal, Asiatic Society of Bengal, Vol. XXVII, p. 122. 

 f Journal, Asiatic Society of Bengal, Vol. XXVII, p. 122. 



( 35 ) 



