Il6 FOOTE: GEOLOGY OF THE BELLARY DISTRICT. 



Half a mile south of the inferred fault, above alluded to, where the 



eastern side of the synclinal is deeply cut across by the gorge of the 



small stream which rises north of Appianhalli and flows north-east 



and eastward past Rajapoor, finally falling into the great tank at 



Avinamadugu, a clear section across the southern part of the Donimale 



Appianhalli stream division is obtained in the gorge. The size of 



sectlon - the stream at the present day is such as to seem 



quite inadequate for it ever to have cut so large and deep a gorge. 



The succession of formations here exposed is the following : — 



9, Trapflow. 

 8. Haematite quartzite. 

 7. Trapflow. 



6. Haematite quartzite, " Ettinahalli bed." 

 5. Trapflow. 



4. Haematite quartzite, " Wala Bhadra ridge," western bed. 

 3. Trapflow. 



2. Haematite quartzite, " Wala Bhadra ridge," eastern bed. ? 

 1. Trapflow. "Joga or basement trap?" 

 Crystalline rocks. 



East of the basement trapflow rises a set of four considerable 

 haematite quartzites separated by gaps in which the intercalated strata 

 are obscured by haematite talus. The relation subsisting between them 

 and their relation to the haematite beds of the great synclinal are not 

 a little puzzling, unless indeed they represent a separate series crop- 

 ping out from under the representatives of the Ettinahalli beds at the 

 eastern end of the Narihalla section, as do certain haematites in the 

 Toga hills. In this case they might be actual continuations of the 

 Saniasihalli water-fall series (see page 123) and unconformably over- 

 lapped by the synclinal series, but they are too important in size, rising 

 as they do into ridges 800 to 1,000 feet above the high level granitoid 

 area to the east, to be passed by unnoticed. They continue southward 

 parallel with the Wala Bhadra Konda beds for some four or five miles, 

 thinning out progressively till they die away before reaching the 

 southern apex of the Sandur area. To the north they appear to be cut 

 off by the fault mentioned above. The annexed ideal section (Plate V) 

 offers what appears to be the most probable explanation of their 

 general relations. 



( us ) 



