MEMOIRS 



OF 



THE GEOLOGICAL SURVEY OF INDIA. 



On the Geology of the Maduba and Tinnevelly Dis- 

 ^ TRiCTS, hy E. BnucE Eoote, F.G.S., Deputy Super- 

 intendenti Geological Survey of India^ 



CHAPTER I. 



INTRODUCTORY, 



Although only the eastern parts o£ the Madura and Tinnevelly dis- 

 tricts have been actually surveyed, with the view to completing" the exa- 

 mination of the fringe of sedimentary formations which borders the coast 

 of the Indian Peninsula, yet enough is known about the unsurveyed 

 parts of the two districts to admit of the preparation of a sketch of their 

 geological features. 



The topography of the districts is very simple, as they both form part 

 of the tract lying between the water-parting along the axis of the 

 Southern Ghats and the Bay of Bengal. Except in the north-west part of 

 Madura district, where the Palani mountains stretch to the north- 

 eastward away from the main mass of the Southern Ghats, the mountain 

 tract belonging to the two districts is very narrow. 



Orography. _ , j > 



much which was formerly considered British ter- 

 ritory having been ceded by the boimdary commission to appease the 

 Spurs of tlie Southern ^^"^^ hunger of the Travancore Government, 

 era part. Qj^j^ ^^^ s^wvs worthy of note extend into the 



( 1 ) 



Memoirs of the Geological Survey of India, Yol. XX, Pt. 1. 



