40 F00TE ; GEOLOGY OF THE BELLARY DISTRICT. 



Much of the country near the Tungabhadra is obscured by cotton 

 Gneisses near the soil > but hornblendic gneiss and schist may be 

 Tungabhadra. seen j n slightly rolling, sometimes almost hori- 



zontal, beds cropping out here and there, e. g., three miles west by 

 south and south-west of Hampasagra. At that place itself there is a 

 considerable show of micaceous schistose gneiss in the rain-cut gullies 

 south-east of the village. The country to the south-westward of 

 Hampasagra forms regular rolling downs with long gentle swells. 



To the east of Hampasagra the gneiss assumes a semi-granitoid 

 character, but is strongly banded. Micaceous gneiss prevails, but 

 hornblendic gneiss is also to be seen along the course of a small 

 stream which rises south of the high road and runs down to the Tunga- 

 bhadra, past Sheganhalli (seven miles east-north-east of Hampasagra). 

 With the hornblendic gneiss is intercalated a bed of magnetic iron, 

 small and unimportant in size, but interesting because of its rarity 

 in this region. 



Further east, along the Dharwar-Bellary high road, are many 

 large masses of the semi-granitoid gneiss, which here dips to the 

 north-east. The rock is a well-banded black and white granite gneiss, 

 much crumpled on a small scale and cut up by many good-sized veins 

 of dense grey-white granulite and small veins of pegmatite. It is 

 particularly well seen on Bandarangan gudda, a low temple-crowned 

 hill i \ miles north-east of Tambrahalli (Tumberhully). 



To the south-east of Tambrahalli the granitoid region begins as 

 Felspathic granitoid pointed out above ; but no exposures of any in- 

 fract terest or size occur till several miles to the south. 

 The tract traversed by the high road up to the Gauripur (Gourypoor) 

 pass, over the north end of the Sandur hills, is occupied by a highly 

 felspathic granitoid belonging to group " c" of the schedule above 

 given. 



This highly felspathic rock occupies a considerable tract to the 

 south-east of Narayandeverkerra and extends southward to beyond 

 Dannayakenkerra, where it seems to merge into the granitoid of group 

 " a ; " but this cannot be asserted positively, as this part of the country 

 was only cursorily examined. ' 



( 40 ) 



