176 FOOTE: GEOLOGY OF THE BELLARY DISTRICT. 



able ridge which stretches north-west by west for a distance of 

 9 miles. 



In the extreme north-east of the district is another great run 

 Great run south of which forms the boundary for some 3 miles 

 Yemmiganur. between the Bellary and Kurnool districts 



about 3 miles to the south of the small town of Yemmiganur (Yem- 

 maganoor). It forms a considerable ridge in its eastern part which 

 is very rocky and bare, and from its light colour a widely conspicuous 

 object. 



C. Pegmatite veins. 

 Veins of pegmatite of large size were not met with in the Bellary 

 archsean tracts, but small ones a few inches or less in thickness are 

 common enough. As a rule they are very irregular in their thick- 

 ness, alternating from mere strings to thick node-like expansions. 

 Their length, too, was in most cases but small, but in many instances 

 it could not be determined because of insufficient exposure. They 

 present the character of veins of segregation rather than of true 

 irruption. In colour they are mostly pale, the orthoclase being, as a 

 rule, of a very light flesh-colour. In no case that came under my 

 notice was the "graphic" structure distinctly visible, as it is in 

 the pegmatites of many other archaean tracts in the Peninsula. 



D. E pi dote- granite veins. 



Small veins of epidote-granite a few inches in diameter are 



common enough in the epidotic tracts, but large dykes or veins large 



enough to be worth indication on the map are few and far between. 



Great vein at Molaga- The most remarkable of these is a very large 



valli * vein noted by Mr. Lake near Molaga valli, a 



large village lying some 7 miles east-south-east of Alur, in the middle 



of one of the largest unbroken spreads of regur in the peninsula. 



The granitic rocks in the south-eastern corner of the Alur taluq are 



remarkably rich in epidotic intrusions (segregations ?), and form one 



( 176 ) 



