GNEISSIC OR METAMORPHIC SERIES: 7 



In the annual report of the Geological Survey of India for 1868, * 



Dr. Oldham mentioned that Mr. C. M. Oldham, 

 Mr. C. M Oldham. *»„■., 



Deputy Superintendent, Geological Survey of 



India, had in that season recognized the occurrence of sandstones and 

 shales of supposedly Rajmahal (Jurassic) age at Tangellamudi (Tunglamoo- 

 dy) near Bezwada, and at Inkolu and Eazpudi on the Guntur-Ongole 

 road. The striking lithological resemblance of these rocks to the Sriper- 

 matur beds near Madras was specially pointed out. 



The latest publication containing geological information touching 



the area under notice is the Nellore District 

 Mr. J. A. Boyie. 



Manual, 2 the geological chapter of which, drawn 



up by the late Mr. J. A. Boyle, m. c. s. (in part from notes supplied 



by the late Mr. C. M. Oldham) refers, but only very briefly, to the 



geological formations in the northern part of the district. The shales 



and sandstones observed by Mr. C. M. Oldham at Razpudi, on the 



Guntur-Ongole road, and supposed by him to be of Rajmahal age (a 



supposition since confirmed by the discovery of numerous fossils), are 



mentioned. 



CHAPTER II.— THE GNEISSIC OR METAMORPHIC SERIES. 



The disposition of the various members of this oldest series of rocks 

 in Southern India is, on the whole, less regular, and shows evidences of 

 greater local disturbances within our area than in some of the more 

 southerly districts, e.g., the Madras (Chingleput), North and South Arcot, 

 Salem, and Trichinopoly districts. In Madras and North and South 

 Arcot especially there is a remarkable degree of parallelism between the 

 strike of the great bands of gneiss and the coast line as at present con- 

 stituted. In the southern half of our present area this parallelism may 

 be detected, but only on a much smaller scale and over short distances, 



1 Published in the Records, Geol. Survey of India, Vol. II, 1869. 



2 Written in part and edited by the late Mr. Boswell, m.c.s., Collector of Nellore. 



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