LOWER TRANSITION ROCKS. 163 



shows as a band of large detached shapeless blocks of black diorite (?) 

 which form no crest, but lie about as if part of a flow, for which it 

 would certainly be taken, but that it cuts across the schists diago- 

 nally in a north-west by north direction. It shows for a distance of 

 four miles and its course is parallel with that of a large and conspi- 

 cuous dyke lying east of Kuditani and its apparent extension four 

 miles further to the north-east,- near Timapur. 



Another large and important dyke which cuts through the Dhar- 

 war rocks is the great Kapgal dyke whose 



.The Kapgal dyke. 



south-eastern end some 7 miles E. N. E. of 



Bellary disappears under the alluvium of the Haggari at Teggin 



Budihal. Here no sections could be traced showing whether the 



dyke was intrusive or whether the Dharwars had been deposited 



around an old trap ridge standing out over the denuded granite 



surface. 



The north-western end of the Kapgal dyke forms a very con- 

 spicuous band of black rock on the northern face of the Kapgal hill 

 itself and is remarkable as a dyke that has weathered more quickly 

 than the granite country it was irrupted into, and has therefore 

 given rise to the formation of a cliff of the granite some 80 to 100 

 feet high above its own surface instead of itself forming a black ridge 

 rising high above the surrounding granite rock as is usually the case. 



The dyke extends with wide breaks far to W, N. W. The 

 part of it occurring on Kapgal is of great interest to archaeologists 

 as having once been the site of a great industry in the manufacture of 

 celts, very large numbers of which were found by me, and later on 

 by other pre-historic-implement collectors, in all stages of manu- 

 facture. The stone specially used was a paler fine-grained trap 

 occurring in lenticular masses, often of large size, in the dark dioritic 

 looking mass of the main dyke. On some of the blocks, too, a number 

 of grotesque figures are chipped into the stone ; some of which are 

 supposed on good grounds to be of pre-historic origin. 



The granite cliff left at the east end of the hill by the more rapid 

 weathering of the trap is a perfectly sharp-cut mural cliff and forms 

 L2 ( 163 ) 



