CHINTALPUDI— CUDDAPAH. 37 



unit by P. N. Bose {Mem., Geol. Surv., Ind.,XXI, 2, 35, 

 42, 1885) following the name used b) r H. J. Carter (Joum., 

 Bomb. Br. Roy. As. Soc, V, 237, 1857). Bose correlates this 

 stage with the Ariyalur of South India (he. cit. 44). 



Corundum.— Name given by C. Greville (Phil. Trans., Vol. 88, 403, 

 1798) from the Hindustani name y^/ (korund), by which the 



mineral has been known and used in India for many generations. 

 The recognition of the rub}- and sapphire as varieties of corun- 

 dum is due to Count de Bournon (Phil. Trans., Vol. 92, 233, 

 1802), who worked on material probably from Sittampundi in 

 the Salem District, where the corundum occurs in a matrix 

 of anorthite (indianite). 



Cuddalore sandstones.— Named by H. F. Blanford (Mem., Geol. 

 Surv., hid., IV, 27, 165, 1862) from the town of Cuddalore, the 

 headquarters of the South Arcot district, Madras Presidency, 

 (11° 43' ; 79° 49'). Various occurrences of beds referred to this 

 series have been found near the east coast of India as far north as 

 Midnapur, and W. King (Pec, Geol. Surv., Ind., NV, 93, 1882) 

 refers the Warkalli beds of the Travancore coast to the same series. 

 The beds unconformably cover the Cretaceous deposits, and are 

 practically undisturbed ; they have been consequently referred 

 to as " young." B. B. Foote (Mem., Geol. Sum., Ind., XX, 41, 

 1883) reports the association of grits, similar to those of the 

 Cuddalore series, with sub-recent marine beds on the Travancore 

 coast. A few occurrences of marine formations of Miocene age 

 have been reported at different' places around the coast, as at 

 Quilon, Karikal and in Mourbhanj (see E. Vredenburg, Rec, 

 Geol. Surv., 2nd., XXXVI, 321, 1908). It seems possible 

 therefore that beds of different ages have been concealed by 

 laterite and other recent formations around the Indian coasts. 



Cuddapah beds. — The representatives of the system known to 

 T. J. Newbold (Joum., Roy. As. Soc., VIII, 159, 1844) as the 

 " Diamond Sandstone, and Limestone " in Southern India. 

 They evidently include King's Cuddapah and Kurnool sys- 

 tems (q.v.) ; for they are described as occupying an area 

 of 9,000 square miles between the 13th and 17th parallels, 

 stretching north as far as the left bank of the Kistna, near 

 Waripilly and covering the eastern and central portions of 

 the Eastern Ghats to Naggery, the adjacent table-lands of 



