DELHI QUARTZITE SERIES. 91 



a passing remark. The little patch 2 miles E.byS. of Rupal is 

 interesting because it and the Aravalli schists at Bodi (a little further 

 east) have suffered a pianino- of their summits and a nearly hori- 

 zontal capping of the Ahmednagar Sandstone that will be described 

 later (see p. 138). 



The much larger semi-detached mass of quartzite forming 



Sardoi tiiiN tlie llills 8urroundm g Sardoi, about 9()0 feet 



high, displays few features of special interest. 

 In a section across it from Yaghodar to Vanta all the quartzite 

 exposed is of pale colours. There are good massive beds of pale 

 or white tint, varying to grey, but without any definite banding. 

 There is no vein quartz. The fine walls of rock W.S.W. of 

 Yaghodar suggest a vertical dip. In spite of this, the intimate 

 structure shows no trace of a sedimentary character, everythin<> 

 being completely recrystallised. There are some horizontal and 

 some vertical divisional planes, but none which imply bedding. 



The strike of the distinctly coloured rock-masses is N. S., and so 



is parallel to the general outcrop and to the general run also of the 

 Aravalli schists in the Meshva river bed as found a little north of 

 Bolundra. 



There is a noticeable change, however, at the extreme south 



of the mass near Bhatkota. The strike of 

 Bnatkota i change of ±t -j i i , 

 strik( . the ridge-mass suddenly veers to N.E. 



S.W., a strike which carries it in the direc- 

 tion of the little Dholia ridge. 5-6 miles away to the W.S.W. All 

 the quartzite here is much impregnated with white vein-quartz. 

 In the opposite direction towards Titoi there is a small hillock of 

 quartzite which seems to carry on the same line of strike. 



Before passing on to the long, contracted ridges of the Delhi 

 Some lithologioal Quartzite in the rest of the area left 

 difiv.en.Ts in the over, it may be remarked that in spite of the 

 confusion apparent in the behaviour and 

 constitution of the quartzite of this expanded area and its semi- 

 detached masses, one general truth seems to emerge, namely that 

 the nearer the quartzite outcrops are to the Phyllite Series the 

 more normal and distinct appears the evidence of bedding and 

 mt erst ratification, whereas in the outcrop of the same rock in the 

 vicinity of the Aravallis, though banding in various tints with 

 occasional coarse ribbing may be prominent, the quartzite shows 

 less trace of a sedimentary origin, appears more glassy and is cut 



