DESCRIPTIVE GEOLOGY: SLATE ZONE. 167 



course to the south-west, then cross the Dore river and join up with 

 the Deesal inverted limb of the sigmaflexure. They disclose almost 

 vertically bedded strata, which in the higher parts of the section are 

 inclined to the north-west, and in the lower part to the south-east. It 

 is examples of -this kind which render it impossible to indicate the 

 dip of such profoundly folded rocks by arrows inserted on the map. 

 The almost vertical position of the Trias in this section gives one 

 perhaps a very reliable estimate of its thickness, because faults and 

 slips of the strata along joint and other planes could have but little 

 effect, or perhaps none, in magnifying or reducing the outcrop of such 

 a set of vertical strata. If this be a correct view, the thickness of the 

 Trias here must average about 1,250 feet. The course which the 

 outcrops take is directly down the hill-spur from Musta via Jhafur 

 and Sirbunnuh to the Dore river, the hill-spur gradually lowering till 

 its foot is buried in river-gravels. Round about Sirbunnuh the beds 

 above the Trias are reflexed and repeated by fold faults two or three 

 times. They have already been referred to in describing the section 

 up the Hertoh river. The junction of the Trias with the slates is 

 a normal one, calling for no remark. 



Between the Sirbunnuh spur and the Uzeezmung hill there is a 

 Section up the Dore deeply cut stream flowing into the Dore and 

 tZteLteS^ draini "S Parallel to the Sirbunnuh spur. The 

 mun 2- point where this stream joins the Dore is the 



normal junction between the Trias and the slates to the south-east, and 

 the latter follow in a broad outcrop | mile wide, and strike due north- 

 east to Nuniali. Starting in this lowest member of the stratigraphical 

 sequence our course up the Dore river and Karati N. is the ordinary 

 route followed by travellers from Abbottabad to the hill stations dotted 

 along the Gulees. A good bridle-road goes the whole way. There is 

 no noteworthy feature about the slates in this exposure, except that as 

 we pass across them they shew many signs of faulting, folding, and 

 disturbance, with complete smashing in places as we near the next great 

 faulted junction between them and the Trias. This line of junction 

 cuts the river south-west of Uzeezmung and is in continuation with 



( "67 ) 



