62 



MIDDLEMISS: THE GEOLOGY OF IDAH STATE. 



any dominating hilly or rolling country after the manner of the 

 calc-gneiss, biotite-gneiss, Kherod series or Mundeti series. 



These scattered areas are located chiefly in the eastern half of 



sheet 14G of the Bombay survey, and more 



Localities. especially along the drainage areas of the 



Meshva river and its tributaries, as for instance near Bodi and over 



the large peneplain stretching from south of Banian vada to near 



Jesangpur, which contains the greatest number of these scattered 



exposures. . 



Throughout this wide region these small outcrops are sufficient 

 by their "general occurrence and lie to enable one to conclude that 

 these Aravalli rocks are constant in their underlie of the whole 

 of the peneplain of this flat area, but they arc insufficient to enable 

 one to supply a properly coordinated penological account of them. 

 Hence the descriptions which follow will of necessity suffer from 

 being imperfect and will be suitably brief. 



(a) The Bodi area. 



What I have here called the Bodi area is a peneplain of this 

 character, lying south of Baighad, and generally having its Aravalli 

 representatives concealed by alluvium. At one place, however, 

 on and below the hill-spur to N. and E. of Bodi village, these Aravalli 

 rocks are still preserved in the form of an underclirr and hill-spur, lying 

 beneath (or so near as to have once been juxtaposed beneath) the 

 overlying horizontal capping of Ahmednagar Sandstone. The latter 

 has undoubtedly acted as a cover, protecting the Aravalli Bchists, 

 etc., from complete reduction down to the base-level of erosion. 

 In other places where this has not occurred the only outcrops arc 

 stream exposures, seen fairly connectedly in both arms of the stream 

 which unite just below Paliarpar. 



In all the exposures of the Bodi area are to be seen biotite- and 



hornblende-gneiss with plagioclase, iron-ore 



Schists and pegma- an( i a ,p a tite, (/,%— 12357). impregnated by 



t,tes - numerous coarse granite-pegmatite veins 5 2 2 fi 9 , 



M (12358), and one instance of an (?) olivine-dolerite dyke, much 



Altered ( 5 \% ffo) and with chilled edges {£& ; see p. 133). Traces 



of similar ' schists and pegmatites are also seen at Raighad and 



Vagdi, and even at Navalpur, N.W. of Vagdi, and within the area 



of Delhi Quartzite outcrops. 



