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GEOLOGICAL SURVEY 



was Government deliberately advised to spend large sums of 

 money in borings ! 



On the completion, in June 1862, of the area included 

 within the limits of sheet 79, the author was deputed to ex- 

 amine the country around Madras, which lies within the 

 area of sheet 78. While marching to take up work on the 

 coast, he made a traverse from Palamaner -in North Arcot via 

 Chittoor, Eanipett, Conjeveram, and Chingleput to the coast 

 at Seven Pagodas (Mahavalipuram). A few weeks of 1862 

 and part of the season of 1863 and the whole of 1864 and 

 a short time in 1865 were devoted to the Chingleput or 

 Madras District (north of the Palar) and adjoining parts of 

 North Arcot. The southern extension of the Kadapa rock- 

 in the Nagari hills and the north-western part of the plants 

 beds in the Sattavedu hills were surveyed by Mr. King in 1864. 

 The results obtained were published in the Memoirs of the Geo- 

 logical Survey of India in 1873, 16 but a precis of the same 

 had appeared in the records of the Geological Survey of India 

 in 1870. 17 This work was joined on to the older work in 

 sheet 79 by the survey by Mr. 0'. iE. Oldham of the country 

 south of the Palar in the season of 1864. Owing to his 

 lamented decease in 1869 his full account of this tract never 

 saw the light, but so much of his notes as referred to the 

 gneissic rocks with the trap dykes intruded into them, and 

 the small patches of Upper Gondwana (jurassic rocks) lying 

 south of the Palar was embodied by the author in a geological 

 sketch of North Arcot which he drew up for the District 

 Manual being prepared by Mr. A. F. Cox, M.C.S. Owing 

 to some unfortunate misunderstanding caused by the author's 

 going to England in 1879 on furlough this sketch was not 



16 The Geology of Madras by R. Bruce Foote, f.g.s. Memoirs of the 

 Geological Survey of India, vol. x, 1873. 



17 Notes on the Geology of the neighbourhood of Madras, by R. Bruce 

 Foote, f.g.s. Records of the Geological Survey of India, vol. iii, 1870. 



