DESCRIPTIVE GEOLOGY: SLATE ZONE. 173 



outlier of the Jura-Cretaceous and Grey limestone, capping the 

 great hill south of Uzeezmung and represented in horizontal sec- 

 tion No. 2. It is somewhat analogous to the long thin outcrops, 

 extending north-east and south-west respectively, from the Deesal 

 ellipse in the same rocks (see Tope sections). East of it the 

 thinned-out middle limb of the sigmaflexure in the Trias, the 

 low-dipping thrust-plane or reversed fault bounding it, followed 

 by the slates, and the Trias limestone of the ridge south-east of 

 Sirbunnah are strike continuations of the similar sequence of out- 

 crops referred to in the section up the Dore. In the neighbour- 

 hood of Batungi the sketch-section represents another sigmaflexure 

 of which there is no trace in horizontal section No. 2. Along 

 the arch of this reflexed fold the slates which begin to pro- 

 trude through the Trias a little north of the "g" of Uzeezmung 

 appear, and they continue increasing in the width of their 

 outcrop towards Beerun Gulee. South-east of the slate outcrop 

 there is a broken or torn middle limb in the Trias on the " i " 

 of Batungi, followed by a narrow band of Spiti shales in the trough of 

 the fold. In the cliff-section, north-north-west of the " M " in Malsuh, 

 the band is very narrow indeed, but it expands considerably in the 

 little gap north of Malsuh village. In the first position, where it is 

 extremely narrow, or almost reduced to nothing by compression of the 

 lips of the Trias limestone, it approaches very nearly to what is called 

 by Heim and Margerie " noyeau synclinal detache par e'tranglement " 

 and must be imagined as of the following structure (fig. 20). After 



the Spiti shales the trough-limb of the 

 sigmaflexure to the right is formed of Trias 

 limestone, repeated in one or two minor 

 folds and rising into the high ridge south 

 f / / (mm/ I / and north of Malsuh, beyond the crest of 



V v *S ' which it comes in conjunction with the 



Fig. 20. slates of the Beibur N. Near Phulkot the 



slates are in abrupt contact with the Nummulitic limestone by 

 a reversed fault. This fault was traced by Hira Lai along the 



( 173 ) 



