140 FOOTS: GEOLOGY OF THE I3ELLARY DISTRICT. 



too much so to be classed as downs, and quite bare of forest, support- 

 ing only grass, and is one of the principal ramnas which supply the 

 cavalry horses in Bellary with hay during the hot weather. 



The trappoids and schists here seen are evidently the extension 

 of the trap and schists Nos. 3 and 4 of the Tumati section, which are 

 themselves extensions of the trapflows and schists occupying the 

 Joga-Sultanpur area. The grassy undulations of the schisto-trappoid 

 tract extend south-east to the south-eastern extremity of the great 

 spur which runs south from the Sugammadevibetta peak (the Copper 

 mountain proper). Here the trappoids stop out and are overlapped 

 by the overlying haematite quartzite series which forms the sides of the 

 synclinal further eastward. 



The hill lying north of the Tumati-Bellary ghat, which is the 

 second highest point in the main range, is crested by two great beds of 

 haematite quartzite ; a third lies on the southern slcpe ; while three 

 others run at intervals along the northern slope. The space between 

 the southern bed and the southern of the two cresting ridges is occu- 

 pied by argillaceous, hornblendic and chloritic schists, some of which 

 are conglomeratic and contain large pebbles of 



Conglomerate beds. 



granular quartz, many 01 which have been much 



deformed by lateral pressure and show a distinct tendency to cleavage. 



The cresting beds show a dip of 85 north-east by north in parts, 



and are vertical at other points along the crest. 



Rather more than ij miles south-east of Haragandona (Hurgan- 



dody) is a valley opening to the north-east, the 

 The Iron Gate section. . 



mouth of which has the form of a huge gateway 



which has lost its lintel, and which, from its great size, forms a strik- 

 ing object as seen from the north. The gate posts are formed by the 

 projecting ends of a great haematite quartzite bed. As no place of 

 note lies near it, and I could not ascertain that it had a local name, I 

 will speak of it as the " Iron Gate " — a name which is certainly not 

 inappropriate. The Iron Gate lies about fths of a mile westward of 

 the northern end of the Tumati section. 



The section here displayed is a rather interesting one, as it shows 

 ( Ho ) 



