PFINTHA— RANIKOT* 103 



district, resting unconforinably on the various formations. They 

 are equivalent to the Cuddalore sandstones. 



Rajgir (Rajagriha) group.— Named by H. B. Medlicott (Rec., Geol. 

 Sun:, Ind., II, 42, 1869) from a hill-range in Bihar (25° 0' ; 85° 

 30'). Quartzites are the most important constituents, forming 

 the prominent hills in this area, associated with mica-schists. 

 The Rajgirs and Mahabar schists (q. v.) are supposed to be 

 equivalent. Similar rocks occur in the Kharakpur (Kurruckpur) 

 hills farther east. 



Rajmahal Series.— Named by T. Oldham {Mem., Geol. Sure, Ind,, 

 II. 313, 1860; Pal. Ind., Ser. II. Vol. I, 1, 1862; Ball, Mem., 

 Geol. Sure. Ind., XIII, 209, 1877) from the hill range which takes 

 its name from the town of Rajmahal (24° 30' ; 87° 30'). The series 

 chiefly consists of trap flows with intercalated grits and carbona- 

 ceous shales. The shales have yielded a very interesting flora 

 described by T. Oldham and J. Morris (Pal. Ind., Ser. II, Vol. I, 

 1862). The traps have been examined by C. A. McMahon (Rec., 

 Geol. Surv., Ind., XX, 104, 1887) and C. S. Middlemiss (ibid, 

 XXII, 226, 1889). They have been compared with the Sylhet 

 traps. Isolated outcrops yielding a similar flora have been found 

 on the east coast with associated marine fossils (see Athgarh, 

 Ragavapurarn, Pavulur, etc.) and until these, fossils are examined 

 the age of the Bajmahal flora must remain in doubt. It is 

 usually accepted as being older than the Jabalpur stage and 

 approximately Oolitic or Liassic. 



Raniganj Stage.— Named by W. T. Blanford (Mem., Geol. Surv., 

 Ltd., Ill, 29, 1863) from the town of Raniganj (23° 36' ; 87° 

 8'), which stands on the formation in the Burdwan district, 

 JBengal. Regarded as the highest stage in Damuda series. 



Ranikot series.— Named by W. T. Blanf jrd (Rec., Geol. Surv., Ind., 

 IX, 9, 1876 ; Mem., Geol. Surv., hid., XVII, 37, 1880) from the 

 stronghold of the Sind Amirs in the Laki range to the north-west 

 of Kotri (25° 54' ; 67° 56'). Regarded by the author as lower 

 eocene in age, being below the Nummulitic Kirthar (and Laki) 

 series in Sind. The Ranikot series consists of a lower division, 

 mainly of sandstones with lignite, and an upper stage character- 

 ised by limestone and shales in which the fossils roughly indicate 

 an age corresponding to that of the London clay. The Upper 

 Ranikot is divided into four principal zones, mainly by mearis 

 of the Echinoidea. The distribution of these and of the 



