1842.] of the Himmalay a Mountains. lxxxi 



be considered as a greywacke ; some of its transitions into argillaceous 

 schist are doubtless entitled to that designation. 



174. On the border of this rock, we find another of so anomalous 

 a character, as to require some illustration from investigations in 

 other parts of the line of strata. It consists principally of indurated 

 clay and quartz, and contains grains of a green pellucid mineral, very 

 much resembling some varieties of actynolite. It also contains mica 

 in notable proportion. It is in fact one of the many aspects under 

 which the above described quartz rock is found to vanish. I have some- 

 times thought that this rock has some connection with one occurring 

 on the road from Bheemtal to Almorah, and which will be afterwards 

 described. Like this, it is connected on the one side with quartz rock, 

 on the other with clay slate. In this quartz it is succeeded by a small 

 patch of slaty limestone, which speedily gives way to the prevailing 

 rock of distinct argillaceous schist. 



175. This schist presents a great variety of types, as may be seen on 

 the road to Deao. It is sometimes compact, sometimes granular, often 

 heterogeneous in composition. The granular types are seldom per- 

 fectly fissile, some not at all. In those which are so, the laminee are 

 almost always undulated. It is further remarkable for the quartz veins 

 by which it is intersected in every direction, not only in that parallel 

 with the laminae of the schist, but also transversely, and in every 

 possible angle of obliquity. These veins, as has been often remarked, 

 never appear to interfere with, or disturb the arrangement of the 

 parallel layers. In one instance, where dip has occurred, a bed of 

 local debris (alluvium of descent) of fifty feet in thickness is observed 

 resting on a highly carburetted type. It is not improbable, from this 

 and other indications formerly observed, that graphite exists in this 

 neighbourhood. I ought not to omit noticing, that the dip wherever 

 observable was between N. and E. 



176. This schist continues in the descent to Kalsee, and under such 

 protean aspects, as renders the study of its relations extremely interest- 

 ing. It is at one time a green slate, with smooth laminae, which by 

 a gradual change, passes into a rock, that in hand specimens could not 

 be distinguished from a greenstone. The transitions into this rock are 

 remarkable for affecting a rombohedral cleavage. Within a few yards 

 it again appears as a shattered slate, Consisting of very thin and scarcely 



M 



