52 FOOTE: GEOLOGY OF THE BELLARY DISTRICT. 



light grey granite gneiss, of fine-grained texture, showing hardly any 



trace of bedding. 



To the north-north-east of this last described hill rise the bold 



and picturesque Daroji hills, consisting of close- 

 Daroji hills. , . .. . . . ' . 



grained pale silver-grey granite gneiss, which is 



locally much altered, so as to assume a strong resemblance to 



pegmatite. This applies to the Drug hill immediately west of 



the village. 



Further north the hills consist of coarse moderately porphyritic 

 granitoid. 



Newbold speaks of veins of this granitoid as intrusive into the 

 Newbold's « Intrusive " typogene schist ". This is not the case : the 

 granite". black trappoid rock, which here forms- the base 



of the Dharwar system, rests on the granitoid without the slightest 

 sign of intrusion from its mass ; but an intrusive mass of pegmatite 

 lies several yards within the black trappoid ; but the pegmatite is quite 

 unlike the old granitoid, and not an irruptive vein from it. Newbold's 

 comparison of this section with MacCulloch's classical section of Cape 

 Wrath in Scotland, is quite unintelligible. 



West of Daroji Drug the character of the granitoid is found to 

 have changed to a close-grained speckly grey rock, which may be re- 

 garded as an aplite, if the term is applicable to a rock not occurring 

 in veins but in vast masses. Here and there it surrounds small 

 tracts of a highly porphyritic granitoid, which certainly seems to 

 be irruptive. 1 



Further west in the hills immediately north of the Travellers' 



bungalow at Gadiganur, the grey micaceous 



iganur 1 s. granite gneiss includes numerous bands of horn- 



blendic schist, which appear to be parts of the basal trap-flow of the 



Included masses of Dharwar system which were pinched in at the 



Dharwar age. time of the great crumpling of the peninsula. 



These bands are of various sizes, from a few yards in length to over a 



1 The irruptions of these porphyritic granites must have taken place prior to the 

 deposition of the Dharwars, the basement bed of which rests on such porphyry without 

 any sign of intrusion by it (see pp. 137 and 139). 



( 52 ) 



