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



crystals, which are quadrangular prisms, terminated by quadrilateral 

 pyramids set on the angles are very small, not more than one -twentieth 

 of an inch in their largest dimensions. Carbonate of lime, (calcareous 

 spar,) was observed only in one specimen. 



103. In tracing this formation of gneiss eastward, we find it accom- 

 pany us from the bridge under Ookeernauth, by Krokee and Oosaree, in 

 the ascent to the Toongnath Pass, (10,000 feet.) Near Krokee, it 

 contains the bluish grey grains described, Art. 101. At Oosaree it is 

 chloritic, the mica having given way to this mineral. The quartz is 

 rather in greater abundance than usual, which renders it rather a hard 

 stone, and as the laminae are very much undulated in the south wall, and 

 the rock splits readily into masses of the required thickness, it is found 

 valuable as a mill-stone, and is much sought after on the Pass. Well- 

 characterised gneiss, of a small grain, and marked schistose structure, 

 occurs. The dip was observed to be N. 20° E. It was particularly 

 obvious in the arrangement of the mountain slopes and precipices. Fig.* 

 will give some idea of this appearance. 



104. Beds of hornblende schist, as usual, are met with, sometimes in 

 a state of decomposition, (between Krokee and Oosaree), sometimes per- 

 sistent (on the Pass), but in a very small quantity. It is here succeeded 

 laterally by clorite schist, which also occupies a very small space, 

 some very large masses of quartz rock are observed, which have evi- 

 dently been derived from the lofty crest that crowns this Pass to the 

 north. A small strip of granite of a middling grain and ordinary aspect, 

 occupies the eastern edge of the Pass, and is I think, part of a vein. In 

 the descent in the Pass no rock is seen in situ, but the fragments are all 

 gneiss, and one type in particular is singularly beautiful, having thin 

 prisms of kyanite dispersed through it in great abundance, thus giving it 

 something of a porphyritic aspect. 



105. The next locality within the elevated zone where gneiss has 

 been traced, is at Dampa on the Gooree river. It was there, observed 

 under two types, interstratified with one another. The one a light grey, 

 having much the appearance of quartz rock, the other darker coloured 

 and larger grained, resembling the rock near Zanee on the Sutlej and 



* The figures referred to here and other parts of this report are wanting, for the 

 same reason that has interfered with the preparation of the sections. They will be 

 forwarded hereafter. — MSS. 



