22 HOLLAND AND TIPPER : INDIAN GEOLOGICAL TERMINOLOGY. 



(2) Deola and Chirakkan marl. 

 (1) Nodular limestone. 

 These were assumed to be roughly equivalent to the (1) Utatur, 

 (2) Trichinopoly and (3) Ariyalur stages in South India ; but 

 E. Vredenburg (loc. cit., 110) regards the three divisions as suc- 

 cessive facies of a single pakeontological stage. 

 Baghanwala Stage. — The name (spelt as Bhaganwala) was suggested 

 by F. Noetling (Rec, Geol. Surv., Ind., XXVII, 74, 80, 1894) for 

 the uppermost division of the Cambrian beds in the Punjab Salt 

 Range, previously and generally known by the descriptive term 

 Salt Pseudomorph beds, or as originally described by A. B. Wynne 

 (Mem., Geol. Surv., Ind., XIV, 69, 98, 1877), as the Pseudomor- 

 phic Salt Crystal Zone, which he referred to as possibly Triassic 

 in age on account of its lithological nature, and in the absence 

 of fossils. The formation is best developed in the neighbour- 

 hood of Baghanwala (32° 42' ; 73° 17') in the Jhelum District. 

 Bagra Stage.— Named by H. B. Medlicott (Mem., Geol. Surv., Ind., 

 X, 150, 1873) from an old fort (22° 38' ; 78° 3') built upon the 

 beds at the mouth of the Tawa gorge in the Satpura range. 

 The name was applied to the uppermost of 'three sub-divisions 

 of the Mahadeva series in the Satpura-Gondwana basin. 

 Bahrain series.— Name used by G. E. Pilgrim (Mem., Geol. Surv., 

 Ind., XXXIV, 7, 20, 21, 1908) for the facies of Nummulitic 

 rocks typically exposed in the Bahrain island (26° 0' ; 50° 33'), 

 consisting for the most part of white limestone or white 

 marl with associated saliferous and gypsum beds. The fossils 

 suggest a correlation with the Mokattam stage of the Cairo beds, 

 corresponding to the Priabonian. 

 BairenkOflda quartzites.— The lower part of the Nallamalai series 

 of the Cuddapah system, so named by W. King (Mem., Geol. Surv., 

 Ind., VIII, 212, 1872) from the Bairenkonda hill (15° 38' ; 79° 

 3'), the summit of which is formed of these rocks. 

 Bakhtiyari series.— Name proposed by G. E. Pilgrim (Mem., Geol. 

 Surv., Ind., XXXIV, 7, 52, 1908) for a series of detrital deposits, 

 consisting of unfossiliferous conglomerates and sandstones cor- 

 responding to the upper part of Loftus' gypsiferous series (q.v.). 

 The gypsum is supposed to have been derived from the underlying 

 Fars beds. The series from its position is considered to be 

 Pliocene and to correspond to some portion of the Siwaliks. 

 It is named from the Bakhtiyari mountains in Northern Persia. 



