OF THE PENINSULA. 121 



The relations of succession and of magnitude presented by this 

 section may be deemed to exhibit in the extreme, the prevailing principles 

 of Geological Association. The space occupied by granite, with its subor- 

 dinates, equals three-fifths of the whole, one-fifth of the remainder being 

 allotted to gneiss and quartz rock, while argillaceous schist, upon the 

 superior limit of the series, equals the two last in extension. The 

 transition of granite to gneiss by the intervention of limestone, horn- 

 blende, and chlorite, and the apparently direct passage of quartz to 

 argillaceous rock, are in the spirit of somewhat difficult graduation, but 

 the methods of approximation and of transition, here less perfectly dis- 

 played, must appear under circumstances of the highest illustrative 

 interest at the points of interference and collision of the series in its 

 southward progress. In respect to economical suggestions which arise 

 upon first regard, the extended plain of Ellore, the Golconda of proverb, 

 yet remains intact, being but slightly encroached upon in the vicinage 

 of a few hamlets, and if this tract may not again degrade the jewels of 

 the earth, the speculation of glittering increase from it may be entertained. 

 The groups of Condapilly and Seizwaria are stored with gems of the 

 garnet tribe, and with varied mineral abundance, while the coast hills to 

 tbe southward appear distributed in rich and nearly continuous succes- 

 sions of metallic deposits. And while nations of the western hemisphere 

 assume a new genius through enterprise, awaked by their mineral advan- 

 tages, the physical developement of these regions may conduce no less 

 eminently to the interests of science and of wealth. 



2 H 



