VI. 



ON THE 



GEOLOGY OF THE PENINSULA. 



By LIEUT. S. CHARTERS MACPHERSON, 



Madras Survey Department. 



The mountain groups of the Indian Peninsula, which are referrible in 

 their immediate connections to either line of Ghauts, may, in the compre- 

 hensive assignment of relations, be regarded as the continuation of the 

 branches, which, depending from the Himalayan chain, merge in the plains 

 of the Ganges and of Sinde respectively. And apart from considerations 

 of geographical analogy, the region which declines on the north of the 

 Kistna, from Ilijdrahad towards the Coromandel shore, bears similitudes 

 in superficial character to the mountain lines to which it claims affinity. 

 This tract of the eastern declension of the Peninsula is Primary; and 

 as the overlying formation which proximately succeeds it to the West- 

 ward, prevails thence continuously to the opposite coast, it presents 

 complete, the series of that division displayed in this parallel. Its plane 

 is eminently traversed by the three hilly ranges of Ilydrahad, Conda- 

 pilli/, and Beizwarra, whicli, with a general north-westerly direction, 

 tend to convergence to the southward. And of these, the Granitic district, 

 M^ith its subordinates, embraces the first, extending to the rise of the 



