LOWER TRANSITION ROCKS. 105 



7. Schists. 



6. Haematitic (thin). 

 5. Schists, hornblendic. 

 4. Trappoid (schisty). 

 3. Schist, hornblendic. 

 2. Schist (much kunkarized). 

 1. Trap "Joga" flow. 

 Granite. 



In this part of the north-east range the mineral character of the 

 different formations often varies very rapidly, rendering a correlation 

 of them with the formations exposed in the other sections, even at no 

 great distance, very difficult, or quite impracticable, unless it is pos- 

 sible actually to follow up the outcrops, a measure requiring great 

 expenditure of time and labour. The most constant beds in this region 

 are the haematite ones, especially when hard and jaspideous or 

 quartzitic ; these generally form strong outcrops, rising well above the 

 softer bed under and overlying them. 



The Joga section affords a striking example of a great change 



Changes of mineral in mineral character of several of the great 

 character of formations, haematitic beds which form such conspicuous 

 features at the eastern side of the Bhimagandi, or eastern gorge of the 

 Narihalla. Close to Ettinahatti these haematite beds are of great 

 thickness and rich in iron. Four miles to the north-west they have lost 

 nearly all their iron and are represented by a great thickness of grey 

 banded jaspery hornstone containing little or no haematite. One small 

 dirty-looking bed of very poor haematite quartzite underlies the horn- 

 stone as seen at the western end of the high ridge. A few hundred 

 yards further west it has dwindled still more and has a thickness of 

 only two or three feet and cannot be traced across the Joga stream bed. 

 The hornstone beds have also become altered, and disappear so 

 suddenly as to suggest the presence of a fault cutting them off. No 

 other evidence, however, of the existence of a fault was found. 



The conglomerate series (in which I include Nos. 18 to 23 of the 



Joga high level sec- J°g a low level section) is much better seen by 

 tlon - climbing the high ridge, which I will call the 



Ettinahatti ridge, as its southern end is close to that village. Starting 



( '05 ) 



