134 POOTE: GF.OLOGY OF THE BELLARY DISTRICT. 



homblendic schists alternating with the haematite beds appear to 

 represent the contemporaneous traps which form so striking a feature 

 jo the north-eastern and southern walls of the Sandur synclinal. 

 Owing to their having undergone far greater pressure in the Copper 

 mountain synclinal, the trapflows have been converted into hom- 

 blendic schists. 



At the eastern end of the synclinal where the compression was 

 much less, as shown by the much smaller angle of dip of the haematites 

 in the Mincheri hills, the traps have only been partially "schistified " 

 (if such a word is allowable), and appear variously as nearly unaltered 

 trap, as a trappoid of semi-schistose character and as true schists, 

 but generally cut up into small masses by an infinite number of small 

 joint planes, often at right angles to the great cleavage planes. 



At the base of the series forming the south-west wall of the syn- 

 clinal lies a great thickness of dark hornblendic 

 Mallam Konda series. 



schist overlaid by a great bed of haematite 



quartzite which in its turn dips under the "Joga" trapflow. The 

 haematite quartzite which is a strong, thick bed forms the crest 

 of a broad lofty ridge, which is separated from the main Copper 

 mountain range by the wide and deep valley of the Tumati stream, 

 and further east by a deep ravine opening to the south into the 

 Hirrahal valley. The summit of this ridge is known as the Mallam 

 Konda and is the highest point in the range after the Copper mountain. 

 These Mallam Konda schists and haematite quartzites are doubt- 

 less the representatives of the Joga hills series, as are also the schists 

 and haematites exposed in a small inlier above-mentioned, which is 

 exposed by the denudation of the lowest bed of the Joga trap ij mile 

 north-north-west of Sultanpur. Mallam Konda is hidden from Bellary 

 town by the main range, but is well seen from the top of the Fort hill. 

 The most important section north-westward of the Tumati section 



Hargandona north- occurs at the bend made h Y the hill range some 

 west section. four miles to the north . fchfe succession of rQcks 



here seen is the following: — 



12. Green brown schist, chloritic ? 

 ii. Hsematitic, decomposed. 



( 134 ) 



