xliv Report of the Miner alogical Survey [No. 126*. 





intricacy of these seams, and the various directions in which they lie. 

 But of the identity of the rock there can be no doubt, as I examined it 

 along the whole of this line, and collected numerous specimens. It is a 

 gneiss of the most perfect type. The Pass is strewed, as might be ex- 

 pected from the appearance of this rock, with huge angular blocks. I 

 may add, that on the South side, a N. E. dip is again met with, but 

 accompanied by a considerable change in grain, and a thinner laminar 

 structure. This observation was made at an elevation of about 12,000 

 feet above this ; all around, the ridges appeared with the same fissured 

 and shattered aspect, while the river (Pabur) bed is strewed with frag- 

 ments of every size, leaving no doubt that the rock is gneiss. 



85. The only imbedded minerals I have observed in this tract are, 1. 

 mica in tabular crystals, but not well defined, nor otherwise of any par- 

 ticular value, (near Seran) ; 2. schorl occasionally sparingly dissemina- 

 ted in small prismatic crystals (near Seran) ; 3. garnets of a lighter 

 colour than usual, small and sparingly interspersed, their figure obscure 

 if not imperfect; 4. quartz of bluish green color in six-sided prisms, 

 occasionally attaining to the size of an inch in diameter, and two 

 or three in length. They are found imbedded in a granite vein near 

 the village of Keelba, but are with difficulty separable from the matrix. 

 The quartz which forms the regular ingredient of this granite is of a 

 light grey colour; 5. it is said that copper and gold were formerly 

 obtained at a spot between Yanee and Keelba on the right bank of the 

 river, but that the workings have been long abandoned. 



86. Hornblende rock occurs in beds in the neighbourhoods to Sera, 

 Tanada, and Kemgos. It rarely consists of the pure mineral, most com- 

 monly of a mixture of that and felspar. It is sometimes of a schistose 

 structure, sometimes of that which I call the cleaveable. The two types 

 appear to pass into each other by imperceptible gradations ; in one case 

 only, near Seran, could I perceive any thing like a transition or passage 

 of the gneiss into this rock, the change in the other instances being 

 sudden, and the contrast marked. These beds are generally of very 

 limited extent, seldom more than a few yards, particularly between 

 Deas and Suran, in which line they are also numerous. Near Tanda, 

 the bed is larger and occupies the whole of the mountain side, forming 

 the ascent to the village. A bed of micaceous schist occurs near Seran, 

 and one of compact quartz rock, forming a precipice of great mag- 



