.\i; WAI.l.l SYSTEM. 



19 



of the same hill, are very similar. One from the western side of 

 Dharol hill 3 - 8 5 7 (12151) is remarkable for the large amount of quartz 

 felspar mosaic in addition to diopside, calcite sphene, etc. 



A few localities where special points of interest appear will 

 i)har() l hjl! next bc mentioned. Dharol hill area and 



that of Vasna are also remarkable for the 

 instrusion through them of the massive Idar granite which will 

 be described later (see p. 119). At the former place, which is 

 5 miles north-west of Vadali. the stock of Idar granite stands up 

 in a bold mass, with ragged sides and summits reaching to an 

 altitude of over 1.000 feet, or 300 feet above the plain, the southern 

 and western flanks being composed of the calc-gneiss with its usual 

 plexus of veins. The sections near the junction are of particular 

 interest because of the way in which the Idar granite conspicuously 

 truncates the calc-gneiss and because of what one must accept as 

 the special metamorphism induced in the latter by that granite. 

 The fust is well seen about \ mile north by west of Dharol village 

 in the general direction of the pathway to Xadri. Here the strike 

 of the calc-gneiss is N.W.— S.E., a direction which naturally brings 

 it into abrupt discordance with the N. — S. edge of the granite boss, 

 though there is a slight bending round of the former as it nears the 

 actual line of contact (see plan, text fig. 1). A less good example 



PLAN 



JL 



rL. A3"2. 



R" cJ 





NADRI 



