xciv Report of the Mineralogical Survey [No. 126*. 



In the bed of the Ramgur, the rock is of a light grey colour, with black 

 specks disseminated. This rock evidently contains talc, (prismatic talc 

 mica,) as well as quartz, and perhaps some felspar. Near the Bungalow, 

 the character becomes more regularly that of gneiss, and at the foot of 

 the ascent to the Ghagur, specimens are obtained which however, unlike 

 the Himalaya gneiss, are yet equally entitled to the name, at least in 

 the present state of our terminology. This gneiss which constitutes 

 the whole of this range, at least in this quarter, is deserving of a 

 detailed description. 



207. This rock may be said to be characterised : 1. by its small pro- 

 portion of felspar ; 2. by the predominance of a talcose or argillaceous 

 ingredient; 3. by the singular types under which it sometimes ap- 

 pears, or in other words, its transitions into very anomalous rocks. It is 

 of a schistose rather than a slaty structure ; has a talcose aspect, varying 

 in colour from a greenish to a yellowish grey, soft though tough, and of 

 the peculiar composition which entitles it to be called gneiss, though of 

 so small a grain as to occasion the separate ingredients to be not always 

 easily recognisable. Besides the felspar and talc, it contains quartz, and 

 occasionally hornblende, (Hemi prismatic augite spar.) The two most 

 singular types into which it passes are; 1, a white schistose rock, 

 probably composed of talc quartz and felspar, and 2, a dull reddish 

 brown amorphous rock of earthy composition, and of a cleavable struc- 

 ture. This passes into a harder type of a darker colour, which is equally 

 remarkable for its cleavable structure, and want of the schistose. This 

 latter is found on the summit of the Ghagur, and has all the appearance 

 of a perfect greenstone. 



208. Below the summit on the south side, the same talcose and 

 schistose gneiss is again found as in the ascent from the north ; but in 

 the descent to Bheem Tal, it appears to pass into an argillaceous schist, 

 which occasionally seems to oscillate towards hornblende rock. In 

 the latter case, instead of being schistose, it is always cleavable, the 

 joints of the cleavage being of a copper brown colour, and exhibiting 

 no marks of the internal composition, which can only be observed 

 in the cross fracture so difficult to obtain in this rock. At the Pass near 

 Sumket, which may be considered as the foot of the Ghagur, a rock occurs 

 very much resembling some greywackes. It is a granular mixture of 

 quartz and clay slate. At Bheemtal, the cleavable rock is prevalent. 



