1842.] of the Himmalay a Mountains. xcv 



209. The strata of which the Ghagur is composed, dip very regularly, at 

 some points varying between E. and N., the inclination generally small, 

 though sometimes as high as 40°. The cleavable types are, if at all, 

 very indistinctly stratified, but they are traversed by rents or cleavages 

 in every direction. The two types may be seen everywhere passing 

 into each other, nor can there be a doubt of their geological identity ; 

 yet it is impossible to have specimens of greater dissimilarity in 

 mineralogical aspect than are furnished by these rocks, a proof, if it 

 were wanting, of the mischief of adopting the geological relations of 

 rocks as the basis of our classification. 



210. Between Bheem Tal and Bhumouree, some interesting pheno- 

 mena are to be observed. The rock continues to be in its general 

 character an argillaceous schist ; some specimens of a purple colour 

 and very perfect type being procured a little below the former place. 

 In the vicinity of this is seen a small amorphous mass of a tufaceous 

 character, and dark greenish grey colour ; and at no great distance 

 again, a huge block of the most compact quartzose conglomerate. 

 In this latter, the cement is of a hardness and compactness which 

 rivals the imbedded portions. No other sample of this rock is seen, the 

 mass is evidently not in situ, but there are no circumstances in the 

 vicinity to give any clue to its origin. 



211. In the bed of the Nullah, half way down, round blocks are seen 

 of a greenstone, in which the crystals of hornblende, (Hemi prismatic 

 augite spar,) are distinct. The specific gravity of this rock is 2.9. 

 That of the purple slate is 2.58. The latter passes into a dark 

 blackish rock of a fine grain, and less perfect schistose character, the 

 specific gravity of which is 2.7. The determination of these evidently 

 points it out as a transition between the greenstone and slate. Fragments 

 of toadstone are found in the same neighbourhood, having the same, 

 specific gravity of 2.7. These consist of a dark, greenish grey ground, 

 with white oblong spots, occasioned probably by imbedded crystals of 

 felspar. The base evidently contains hornblende or augite, but the 

 composition is impalpable, and to appearance, even with a magnifier, 

 homogenous. 



212. A little below this a rock is found something resembling the 

 transition between the greenstone and the schist, but of a lighter 

 colour, it may probably be called a fine greywacke. It is distinctly 



