

204 HOLLAND : SIVAMALA1 SERIES. 



diamonds." The occurrence of beryl in the acid pegmatites, and of 

 chrysoberyl in the felspar-rock near by, suggests a genetic relation- 

 ship. Masses of quartz occur also near the eastern foot of Sivamalai ; 

 but whether these or any of the quartz masses found in the neighbour- 

 hood are genetically connected with the elaeolite-syenite and its 

 associates is not certain. Almost every igneous eruption (even; 

 peridotite) seems to be accompanied by quartz veins, probably as aa 

 end-product of the segregative consolidation* 



< 36 ) 



