128 FOOTE: GEOLOGY OF THE BELLARY DISTRICT. 



across the bed of the Narihalla, which here flows in a very pretty- 

 valley between low rocky hills both of schists and granite gneiss. 



The main boundary of the Dharwars lies half a mile to the east 

 of this, and from here onwards south-eastward loses its ragged 

 character but continues ragged for a couple of miles or more to the 

 northwards. 



Somulapur, a small half-abandoned village, just within the border 

 The Somulapur pot- of Kudligi taluq, and half a mile south-west of 

 stone - Kannevihalli, is partly supported by a small 



industry in potstone vessels, which are made with some degree of 

 skill. The potstone occurs in beds close to the base of the Dharwars, 

 and is quarried to a small extent in a quarry pit nearly circular in 

 shape and about 30 feet across. Three beds of potstone are seen — 



3. A coarse green bed of inferior quality. 



2. A grey middle bed of good quality and alone used. 



I. A coarse green bed resting on the underlying gneiss which is seen a little 



to the west. The industry will be described in the chapter on Economic 



Geology. 



These Somulapur potstone beds are the only ones in the Bellary 

 district positively known to belong to the Dharwar system. 



B. — The J oga- Suit an pur area. 



The tract lying between the Sandur and the Copper mountain syn- 

 clinals, which I call the Joga-Sultanpur area, from two villages at its 

 western and eastern extremities respectively, is very largely occupied 

 by a series of trapflows, which lie very near the base of the whole 

 Dharwar system. 



With the traps, but underlying them, are some schists and haematites 



Basement schists which a PP ear t0 be reall 7 the base of the 



and hematites. system. A few unimportant schist and haematites 



and one small limestone bed occur intercalated between the trap flows, 



and prove by their position that the trap was not one vast flow, but 



represents a succession of minor ones, separated only locally by the 



very small sedimentary deposits just named. 



( 128 ) 



