42 • SUB-HIMALAYAN ROCKS OF Iff, W. INDIA. [CHAP. II. 



about Banallab. and Sohana soft mica-schists, and hornblendic, garrietiferous schists are 

 horizontal, or incline at a low angle to the east. A dense hornblendic trap-rock occurs among 

 these rocks in this locality ; it is the only rock of its class I have noticed in the vicinity of the 

 Chor. On the spur east of Sohana the felspathic rocks show in massive beds, twenty and forty 

 feet thick, and still dipping at 15° to east-north-east. The same massive granitoid rocks appear 

 in the valley, about a mile above Talichoag ; and again on the spur west of Nara they occur low 

 down. There are here some coarse pegmatitic varieties, with hxmps of schorl, as large as a 

 man's head. East of this spur a high northerly dip often occurs locally, both in the schists 

 and the gneiss. At Cha.ra mica schists are again but slightly inclined, and to north-north- 

 east. In the relative positions of the rocks there is however a very important contrast between 

 the junction on the north and on the south of the Chor. On the north the schists rest on the 

 granitoid rock. On the south the superposition of the latter is decided. 



I went up the Chor along the spur west of the Palar. The ascent was very laborious, as the 

 snow was in many places waist-deep (23rd February). The sections were of course concealed, 



but in the great, bare masses on the summit I could see that the 

 Granitoid rock of summit. 



rock was the same as elsewhere, — ^a coarse, but distinctly foliated 



rock, weathering in a sub-angular manner, corresponding with such a texture, and not as a 

 massive rock. I did not cross the south-eastern spur at a higher point than Geruani, where, 

 as might be anticipated, the felspathic or granitoid rocks are not found. Thus, then, the mass 

 of granitoid gneiss is isolated. Besides the many local observations proving that the foliated 

 structure of this gneiss is constant, and that it always has a stratified appearance in these 

 rocks forming the summit of the Chor, and showing also the general parallelism of dip in these 

 rocks with that of the associated schistose and slaty beds, we find in addition that the 

 general feature of interstratification is equally well marked. In the great gorges on the 

 south of the mountain the outcrop of the junction of the granitoid with the schistose 

 rocks forms a decided curve inwards, or to the north ; while at Suran, on the north 

 of the mountain, there is an equally distinct curve in the same direction (outwards), the river at 

 Suran having markedly undercut the plane of junction. In both cases, however, and especial- 

 ly on the south, the underlie of this plane of junction seemed to me steeper than what should 

 be due to the low angle of dip in the associated schists, supposing the two coincident. The 

 form of the mountain also corresponds with the structure I have described, being more steeply 

 scarped on the southern face than on the northern. The ground-plan of the granitoid mass 

 (as broad as long) is nearly as great a difficulty on the supposition of intrusion as on that 

 of mere metamorphism ; and this difficulty is increased by the absence, so far as observed, 



of any of the concomitants of igneous intrusion, such as disloca- 

 Uo veins. ... . 



tion with permeation of veins, or of special contact action of 



so great a quasi-igneous mass. 



The region on the south-east of the Chor presents one important point of agreement with 



the sections on the north-west and on the south-west : the 



inclination of the strata is towards the mountain. I cannot state 



the facts so closely as in the other cases, as I have not been on the Haripur ridge, which is 



the main south-easterly spur of the Chor, but from Geruani and Juin all down the valley 



of the Neveli to beyond the Tons a north-westerly inclination is general in the strata. The 



section is, however, much more complicated than on the west : from the Giri up to the 



