Chap. II.] general description of country. 27 



clearl}'- exhibited ; I sliall afterwards describe the contemporaneous rocks 

 of Verdachellum and Pondicherry, and pass to the wide spreading deposits 

 which I liave termed " Cuddalore Sandstones." 



I shall only make a few brief prehminary remarks on the modern 

 deposits of the river-valleys and of the coasts, and on the crystalline 

 and semi-crystalline rocks, (which have been surveyed almost exclusively 

 by my colleagues Messrs. King and Foote,) viewing them only so far as 

 they are connected with the stratified rocks which form the main 

 subject matter of these pages. 



Part II. — Descriptive Details. 

 § 1. — Trichinopoly District, 



Of the Geology of Trichinopoly, as indeed of most of the Southern 



districts of the Peninsula, but little has hitherto 

 Little hitherto known. , mi t> -kt t ^ -i 



been recorded. The researches oi Newborn, 



MalcolmsoQ, Voysey, and most of those earlier Geologists, who have 



contributed so much valuable information respecting the Central and 



Northern Provinces of the Madras Presidency, never extended to the more 



isolated Southern districts,* and Messrs. Kaye and Cunliffe, to whose 



labors we mainly owe our knowledge of the neighbouring district of 



South Arcot, restricted their personal investigations to the rocks of that 



district, and were only able, by availing themselves of the assistance of a 



non-geological friend, to substantiate the existence in Trichinopoly of rocks 



of similar age to those which they had examined in person in the 



neighbourhood -.of Pondicherry and Yerdachellum. With the exception of 



* Excepting a narrow strip on the West Coast, which has been described by Captain 

 Newbold and also by General Cullen. 



