

138 HOLLAND : GEOLOGY OF THE NEIGHBOURHOOD OF SALEM. 



generally the case with infiltrated vein quartz, whilst the liquid 

 inclusions arranged in trains are quite characteristic of plutonic 

 quartz. The absence of the blue-grey colour and the minute needles, 

 to which I think this colour is due, serve to distinguish the "white 

 elephant rocks " from the quartz of the charnockite series by which 

 they are surrounded. 



There is no direct evidence for connecting these masses of 

 quartz with any particular eruption in the neighbourhood. But the 

 nearest eruptives are the peridotites of the Chalk hills, and as every 

 peridotite intrusion in South India seems to be accompanied by 

 masses of pure white quartz, it is not unlikely that these masses 

 belong to the Chalk hills province, and represent the end-product 

 of that eruption [vide page 32). 



( 36 ) 



