272 Mr Hardie on the Geohgy if the 



mica, are very often included in this matrix, which gives it the 

 appearance of partially decomposed granite. In this, as in other 

 kunkurs, carbonate of magnesia is uniformly associated with the 

 carbonate of lime ; but the earthy carbonates bear a very small 

 proportion to the other ingredients present. When beds of this 

 kunkur immediately overly strata of the softer varieties of ar- 

 gillaceous schist, the latter are occasionally impregnated, to a 

 considerable depth, with calcareous matter, obviously the pro- 

 duce of percolation. In such cases, the line of demarcation be- 

 tween the kunkur and the schists is often scarcely traceable. 

 The one seems to pass insensibly into the other, and the decep- 

 tion is increased by the peculiar arrangement and position of 

 the imbedded masses of the kunkur, which give rise to an ap- 

 pearance somewhat resembling vertical stratification. To this 

 peculiarity I shall have occasion immediately to revert. 



The imbedded masses of these kunkur-beds consist of sphe- 

 roidal and occasionally angular fragments of a variety of diffe- 

 rent rocks, such as granite, gneiss, micaceous and argillaceous 

 schist, quartz-rock, limestone, and limestone-schist. The masses 

 of quartz-rock are very abundant ; their usual colour is white ; 

 others are reddish-white, and some specimens I obtained of a 

 sapphire-blue tint. The granites are various, some are red and 

 fine granular, others are coarse-grained and of a grey colour ; in 

 others hornblende is seen in large proportion, while fine-grained 

 sienitic granite is also common. The gneisses are equally va- 

 rious, as are also the argillaceous and siliceous schists. 



Into a minute account of the mineral ogical characters of the 

 different rocks found imbedded in the kunkur, it is not necessary 

 to enter. It is sufficient to remark, that the varieties are very 

 numerous ; that the original localities of most of them are as yet 

 unknown, though a number may be traced to the hills imme- 

 diately surrounding the valley ; and that it is exceedingly pro- 

 bable that many of them have been transported from a distance. 

 Neither granite nor gneiss occur in situ in the valley of Oodi- 

 poor, though both are found abundantly to the westward, in 

 the plains of Mewar and elsewhere. Some of the imbedded 

 masses would even seem to belong to a class of rocks of a more 

 recent date than any which have as yet been discovered in this 

 neio-hbourhood ; but our knowledge of the geology of the coun- 



