PREVIOUS OBSERVERS. 



IV, V, and VI. — Upper and lower trap and the enclosed sedimentary formation. 

 VII. — Sandstone formation. 



A. Coarse thick-bedded sandstone with iron hands, subsequently 



considered the equivalent of the sandstone of the Mahadeva 

 hills or Mahadeva group of the Geological Survey classification. 

 To this group Mr. Hislop referred the sandstones of Bokhara, 

 Silewada, Kamthi, and other localities northward of Nagpiir, 

 and that of Baraogaon and Chookheri to the west and north- 

 west, also that at the base of Sitabaldi hiU. In one of his 

 later papers, Q. J. G. S., vol. xvi, p. 159, Mr. Hislop classed 

 this division with the traps. 



B. Laminated sandstone or shale; subsequently considered the 



equivalent of the Damiida group. In this division, Mr. Hislop 

 placed the laminated fossUiferous sandstones of Silewada and 

 other localities near Nagpiir, and also the red shale of Mangli. 

 The latter Mr. Hislop subsequently considered newer than the 

 laminated sandstones. 



C. Red shale of Korhadi near Nagpiir, afterwards referred (correctly) 



to the Talchii- group, but still later, Q. J. G. S., xx, p. 282, 

 classed with the beds of Mangli and Maledi above the 

 laminated sandstones. 



D. White marble of Korhadi, &c. 



VIII. — Plutonic and metamorphic rocks. The plutonic rooks 

 Mi\ Hislop considered as of later date than the sandstone 

 formation. 



It is as well to mention at once thatj besides the differences from 



Mr. Hislop's views on the history of the traps and intertrappean, which^ 



in common with the late Mr. J. G. Medlicottj* I have already expressed 



in these memoirsf, the result of my examination of the Nagpiir country 



Eelations of these ^^^ ^''^ "^^ ^"^ conclusions with regard to the 

 S'^o^V^- relations of the sandstones differing from those of 



Mr. Hislop in the following points. With regard to Mr. Hislop's 

 division A, I look upon the beds at the base of Sitabaldi hill and 



* Memoirs of Geological Survey of India, vol. ii, pp. 206 — 208. 



Dr. Carter was the first to suggest the idea of the trap beneath the intertrappean 

 formation being a subsequent effusion, — Jour., Bombay Br. E. A. S., vol. v, p. 267. 

 t Vol. vi, pt. 2, pp. 152—155. 



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