396 



Notes, chiefly Geological, #c. 



[No. 173. 



nut, occasioned by the weathering and falling out of the nests of mica 

 and hornblende just mentioned. 



Actynolite, chlorite, and pale rose-coloured garnet were the other 

 minerals observed in this granite. 



The range of hills, having a north and south direction, and though 

 a break in which the Chittoor river runs easterly to the Poni river, I 

 found to consist of gneiss often highly contorted and penetrated by gra- 

 nite in large dykes. Some portions of this gneiss are granitoidal, and, 

 in hand specimens, would be set down as granite; dykes of basaltic 

 greenstone also penetrate both granite and gneiss. 



Before closing this paper I must remark, that the soil from the plain 

 of Rachooty to Chittoor, has been generally of a reddish and sandy 

 nature, evidently the alluvium of granitic and hypogene rocks. 



The great sheets of regur end abruptly near Cuddapah, their barrier 

 to the south in this direction appears to have been the Bankripattah 

 hills. 



