ARCH^AN AND PLUTONIC ROCKS. 35 



Three small outcrops occur at distances of about two miles each, 

 two to the east and one to the north by east of Kanch Kerra, five and 

 seven miles north-west by north of Uchingi Drug, respectively. Yet 

 another small outcrop occurs about half a mile south of Angur 

 (Ungoor),on the Tungabhadra, 19 miles north-west of Harapanahalli. 



Of the several outcrops, only a, b ) c, and the little outcrop at 

 Angur, seem to have been worked for building stone, for pot-mak- 

 ing material, or for small ornaments. At Arsapur, at the northern 

 end of the outcrop, just west of Narasimha-dever gudda, a considerable 

 industry in potstone vessels is now in swing. At Nilgunda, a beauti- 

 ful little temple has been built on the bund of the great tank, of fine 

 grey potstone said to have been quarried there. 



The great mass of the rock, both at Arsapur hill and Nilgunda hill, 

 is very coarse, with granular fracture, and varying in colour from dirty 

 olive-green through bluish green almost to black. Only the light 

 greenish grey fine-grained parts of the rock are worked, and an ac- 

 count of the potstone industry will be found in the Chapter on Eco- 

 nomic Geology (Chapter XI). 



Excepting Uchingi Drug and Narasimha-dever gudda, the granitoid 

 rocks form no hills of any size or demanding any special notice. 



The low hill lying south-west of Harapanahalli consists of a fairly 

 well-bedded, pale grey granite, which has been largely quarried. It 

 shows the north-westerly strike which prevails in that quarter. It 

 has a very low dip of from 20 to 30 only, an unusual thing in the 

 granitoid rocks. 



A great wilderness of granitoid rocks in low hills lies between 



Harapanahalli and Arsakerra and a similar but 

 Wildernesses. 



smaller one occurs to the west of Uchingi Drug, 

 but neither present features of sufficient interest to merit further 

 notice. 



Narasimha-dever gudda and the ridge to the east-south-east consist 



Narasimha-dever °f a fine " stripey " granite gneiss, with a well- 



gu a ' marked dip of 5o°to 6o° south-south-west, which 



is particularly well seen from a few miles to the south-east. The 



02 ( 35 ) 



