DESCRIPTIVE GEOLOGY : SLATE ZONE. 



145 



retained in the folds of the Trias limestone, a wide band of them 

 extending from the band near Kalapani staging bungalow. But 

 whilst the eastern side of the ridge is a great scarped wall of Trias 

 limestone, the north-western and western slopes are dip-slopes in a 

 general way, the section from the 8,848 ft. peak in a north-westerly 

 direction down to the great gap being as below, fig. 14. 



In it the Trias dip- 

 slope, modified by 

 minor folds, and with 

 the Spiti shales occu- 

 pying hollows, meets 

 the slates in the great 

 gap, and is divided 

 from them by a fault 

 approximately verti- 

 cal. A similar sec- 

 tion from the more 

 southern part of the Tandicini ridge to a point a little north of the 

 Kalapani bungalow is next given belcw, fig. 15 : — 



Hertoh R. 



Fig. 14. 

 <? = Spiti Shales. 

 d — Trias Limestone. 

 c= White Quartzite. 

 6 = Purple do. 

 a = Slate Series. 



? base 

 Trias. 



of 



In this 

 L 



E.S.E. 



Fig. 15- 

 e = Spiti Shales. 

 d — Trias Limestone. 



section the slates are not visible, but a dip-slope in the 



( Ms ) 



