NILGHIEI HILLS. 



225 



The striking resemblance of this banded structure to that seen fre- 

 quently in limestone rocks, where thin bands of 

 limestone and shall repeatedly alternate, and 



Its origin. 



Piff, ///.—Thin altetnations nf limestone and gneiss, weathered ; — near Coimbatoor. 



the regularity and continuity of this rock for a distance of seven miles 

 and probably even more, render it diflScult to believe that it can be 

 other than a really metamorphosed band of sedimentary rocks, and 

 afford the strongest evidence of such an origin that has yet been obtained 

 in this part of India. 



Intruded Rocks. — The intruded rocks of the Neelgherries are of one 

 kind only, viz., a compact basaltic Trap, which 



Trap, the only intrud- occurs in small dykes at one or two localities 



ed rock of Neelgherries. 



in the Northern part of the Neelgherries, and 

 on the Westerii edge of the Kundahs. We may however, also con- 

 sider under this head, the largely crystallized 

 Granite common in granite Veins which are by no means uncommon 



low cotintry. 



in the foliated rocks of the low country, and are 

 most numerous in the neighbourhood of Sunkerry Droog in the Salem 

 District. To the East of this locality they become more and more 



