66 .\11!>1>U-:.\IISS : THK GEOtOGS of idar ST.Vl'K. 



The tourmaline becomes massive in places and with a radiating 

 columnar structure [ffa t fo% 5 2 ^-(123(»9) < Jft} 



Here also at Kavadia occurs a very fissile, lenticularly foliated, 

 muscovite-biotite-schist or gneiss ( 4 2 y — 12370). It contains veins, 

 veinlets and eyes of more gneissic material. It may represent a 

 more crushed and foliated edge of the Vandiol gneissose granite. 



The same rock with many quartz veins and pegmatites of 

 quartz-schorl rock is well marked at intervals on the surface between 

 Sodpur and the Delhi Quartzite hill above Kavadia. At the foot 

 of the latter hill these rocks appear roughly in situ, in rising ground 

 above the alluvium, the strike of the foliation and interbanding 

 of the gneiss and quartz-tourmaline veins being N.W. — S.E., that 

 is, at right angles to the strike of the Delhi Qua.rtzite of the ridge 

 which dips down against them, thus establishing a complete dis- 

 cordance. 



Other pegmatite occurrences, very coarse and with tourmaline 

 IS addition to muscovite. are found at many places too numerous 

 to mention, especially in the Aleshva, river and its main N.— S. tribu- 

 tary (just as was described at Bodi). All these pegmatites (e.g., 

 ■ii-:) from Sunak. appear to be entirely subsequent to. and pro- 

 bably much younger than, the schists with their gneissic veins and 

 the gneiss or gneissose granite of Vandiol and Jesangpur. 



In a deep reddish pegmatite vein *{ ] C) (12395), just below Vajapar 

 on the Meshva River, and which is intrusive 



Fluorspar. . ,, 



as several parallel dykes m augen gneiss, there 



were found small particles of a violet-blue mineral in small patches 

 along certain lines. Its specific gravity is between 3-0 and 3*1 refrac- 

 tive index about 1*44:, chemically it contains Ca and F, and it etched 

 a watch-glass on the application of sulphuric acid. It is isotropic. 

 It is therefore fluorspar. The above determinations were made by 

 Dr. Christie, and are of interest in view of the great rarity of fluor- 

 spar in India. 



At Jesangpur there must be a considerable extent of grey crys- 

 talline limestone ( 3 2 (f 3 , 12371), indicated by 

 Grey crystalline lime- ^ sca ttered outcrops that are visible within 

 1 or 2 miles radius of that place, and by the 

 material exposed in wells. It makes a good building-stone, a temple 

 at Bhetali being built of this rock in cut stone. Owing to the ex- 

 posures being entirely surrounded by alluvium and detached from 



