LOWER TRANSITION ROCKS. 157 



deeply eroded, and much polished by the river which here descends 



rapidly and forms a violent rapid. 



A couple of large pegmatite veins of similar character cross the 



.. Tungabhadra just 3 miles N. E. by N. of 

 Veins crossing the ° J u J 



Tungabhadra below Kampli (Kumply) and form dyke-like reefs in 

 the bed of the river. 



(c) Brecciated Quartz-runs ^ Fault-rocks"). 

 A very small number only of these remarkable dyke-like masses 

 of quartz have been actually intruded into the Dharwar rocks, but 

 several occur along the boundaries of the Sandur hills and Copper 

 Mountain tracts in positions in which they may well be regarded as 

 fault-rocks. 



The examples of intrusion of these quartz-breccias into the Dhar- 

 war rocks area are three in number, and two of 



in^oTe^h™. them occur near the ™^™ end of the Copper 

 Mountain area to the north of the village of 

 Daroji. They lie i| and 2 J miles respectively northward of the 

 village, and the northern of the two forms a small steep crag capped 

 by a small temple. The crag is of the usual pale creamy to reddish 

 or buffy white colour, its course is W. N. W.— E. S. E. for about i£ 

 mile, and both ends disappear under cotton soil. 



The more southerly of the runs strikes a little south of east for 

 a distance of about ij mile where, like the first named, its ends 

 disappear under the cotton soil. 



The third case is a quartz intrusion within the limits of the 

 Penner-Haggari band 2\ miles S. S. E. of Naddevi (Nuddavy) 

 on the Tungabhadra. The run rises in the middle of a great 

 cotton soil spread, and no contact with the schists or traps of the 

 Dharwar series it has been intruded into is visible. 



There are three cases of boundary fault-rocks of brecciated quartz, 



each visible for about a mile along the southern 



S^X^lt^^^ boundary of the Copper Mountain tract, but 



they are of no special interest. They occur at 



( 157 ) 



