354 



LIETJT.-GElf. C. A. MCMAHON ON 



[May 1900, 



appears as a thick sheet in the stinkstones at Altit and in massive 

 outcrops. Most of the cliffs between Ata-abad and Gulmit are 

 composed of it, and the road between these places runs through it 

 nearly the whole way. Next we have our old friend the Hatu Pir 

 Granite. A dyke of this, 6 feet wide, cuts obliquely across the 

 crystalline limestones, intrudes into the Baltit Hornblende-Granite, 

 and runs a course through it parallel to the line of strike. The 

 third intruder in the stinkstones is the Askurdas Muscovite-Granite, 

 which occurs as a sheet 10 feet thick. The fourth invader is an 

 aplite which runs in small veins through the stinkstones. 



About 3 miles south of Ata-abad the stinkstone series ends, and is 

 succeeded by massive mica-schists, which have been so profusely 

 invaded and metamorphosed by the granite that no trace of their 

 strike or dip can be made out. The granite, as above mentioned,, 

 runs right through the stinkstones and their intercalated mica- 

 schists (sheared granites), and spreads out in the overlying schists. 

 The granite has not obliterated, or masked, the bedding of the stink- 

 stones ; but, owing probably to the greater fusibility of the 

 schists, it has destroyed all trace of bedding in them, and the whole 

 mass of granite and schist is now traversed by joints like an 

 igneous rock. 



Fig. 3. — Diagrammatic section of Gujhal rods, from Gulmit to 



Misgah . 



Pasu. 



Khaibar. 



G-ircha. 



Misgah 

 Hi 



\\^mM 



Iflica-sGhist intercalated 

 with beds of slate*. 



Grey limestone with 

 a few beds of dark slate. 



Slaty schists with 

 intrusive dykes of granite. 



These massive, granite-invaded schists extend for about 15 miles, 

 and at Gulmit they pass into mica-schists intercalated with beds of 

 slate which are sufficiently good to be used as roofing-slates. These 

 beds dip northward, and strike east and west across the valley. 



At Pasu (see Capt. Roberts's diagrammatic section, fig. 3) grey 

 limestones succeed and extend, with a few beds of dark slate 

 intercalated with them, as far as Gircha. I shall in the following 

 pages refer to these under the name of the Gujhal 1 Limestones. 



* "When we left,' my son writes, ' the metamorphosed gneiss and 

 schists, with its granite at Pasu, we found ourselves among 

 mountains of limestone lying at about the same angle [that is, 

 nearly vertical] and striking also east and west. This limestone is 

 many miles in thickness, and forms whole ranges. Here and there 



1 The main valley of the Hunza Kiver running northward from Gulmit is 

 called Gujhal. See p. 140 of Col. A. Durand's ' Making of a Frontier,' 1899, 

 a work that contains good descriptions and beautiful views of the Gilgit 

 cenery. 



