1DAR CHAN'ITE. GHANOPHYRE, ETC. J 19 



composed of the older calc-gneiss series profusely penetrated as 

 usual by thin bands of vein aplite whilst directly in the saddle 

 between the two hill portions, and on the footpath joining the 

 villages of Asai and Vasna, come a thick and a thin band of the 

 coarse and fine Idar granite. The latter is of typical massive Idar 

 granite weathered into its characteristic grotesque monolithic masses, 

 some being as large as a house and one a gigantic ovoid body, 

 perched on end in a very unstable condition (see PI. 5, fig. 1). Its 

 outcrop cuts directly across the strike of the calc-gneiss and the 

 general run of its accompanying aplite veins with complete trans- 

 gression, one actual junction section showing torn-ofi" fragments of 

 the aplite included in the Idar granite. In composition, grain, colour 

 and habit the Idar granite and the vein aplite are entirely distinct. 

 Another junction of the same sort is afforded by the tiny range 



just south of Morad village, 3 miles N.W. 

 xw^nrvaliali'' " liK ' S of Vadali. At that place a small tongue, of 



Idar granite may be seen transgressing the edges 

 of the calc-gneiss, but the exposure is on a small scale and is not 

 very good. 



A third excellent example is furnished by the western edge of 

 the Dharol hill-mass, about 5 miles N.W. 



Dharol Hill. .,,,,. , . , 



of Yadali, where, on one of the spurs to the 

 north of Dharol village, the calc-gneiss, distinctly banded and 

 injected by the vein aplite with a N.W.- — S.E. strike, comes into 

 abrupt contact with a N.- — S. outcrop of the massive Idar granite 

 building the main body of the hill. This has already been referred 

 to in the section devoted to the calc-gneiss (see p. 19) and the 

 special contact reaction of the Idar granite on it with production 

 of idocrase rock (p. 20). 



These few examples are perhaps sufficient to prove the younger 

 age of the Idar granite and its eruptive contacts towards the calc- 

 gneise with its plexus of vein aplite. They thus confirm the im- 

 pression derived from a consideration of the distribution and general 

 appearance of these granite masses. 



This relationship between the two sets of granitic rocks appears 



to find a close parallel in certain occurrences 



ParalU-i mm in s.e. described bv Barrow in the S.E. and C. 

 and ( . Highlands. « 



Highlands (see Summary of Progress, Geolo- 

 gical Survey, 1907. p. Ill) where likewise the granites are broadlv 

 divisible into two, an older and a newer group. The newer occurs 



