84 FOOTE : GEOLOGY OF THE BELLARY DISTRICT. 



Another great outcrop of trap which shows very conspicuously on 

 the open down 4 miles north-east of Hollal presents on the surface 

 more the appearance of the outcrop of a flow than of a dyke, and 

 I should certainly look upon it as the former, but for the remarkable 

 straightness of its course for the 6 miles along which it shows a 

 well-marked belt of very large and intensely black blocks. 



Quarts veins of fair size and blue colour, of good-looking quality 



in gold prospector's parlance, occur in fair num- 

 Quartz veins. 



ber near the base of the Dharwars to the south 



of Kalhalli gudda, on and at the north-eastern end of the hills north of 

 Hallagilvad ; also to the east and north-east of Teligi hill, and are 

 indicated on the map. They look to be worth close prospecting 

 despite that gold is not known to occur in this quarter. 



2. The Mallapan gudda band. — This, as before explained, is the 

 section of the great Dambal-Chiknayakanhalli band which lies within 

 the limits of Bellary district. It enters the district at the gorge 

 The Tungabhadra °^ ^he Tungabhadra at Honnur, and runs south- 

 gorge section. eas j. £ or some 25 miles when it crosses into 

 Mysore. The sequence of rocks seen in the gorge is the following, 

 and it occupies a length of a little less than 5 miles :— 



10. Hornblendic schists. 

 9. Do. trappoid. 



8. Contemporaneous trap. 

 7. Trappoid. 



6. Flaggy haematitic quartzite. 

 5. Boulder conglomerate. 

 4. Contemporaneous trap. 

 3. Schists and argillites. 

 2. Haematite schists. 

 1. Hornblendic trappoid. 



The uppermost beds — the hornblendic schists (No. 10)— are faulted 

 The eastern boun- against the gneissics : the whole band in fact is 

 dary faulted. thrown down to the eastward by a succession 



of faults which form its eastern boundary nearly everywhere, while 

 the western boundary appears to be everywhere a simple erosion 

 boundary 



( 84 ) 



