6 BLANFORD : GEOLOGY OF NAGPUR. 



its neighbourhood as later in age than the coarse sandstones of 

 Bokhara^ Silewada^ Kamthi, &c. The former I classj as did Mr. Hislop 

 in his later papers, as representatives of the Lameta or infratrappean 

 beds, now clearly ascertained to be much newer than the Mahadeva 

 sandstones proper.* The latter I associate with the ' laminated sand- 

 stone' of Mr. Hislop in a group which I call ' Kdmthi' and which is, 

 I believe, older than the Mahadeva group. To this Kamthi group I 

 refer the rocks of Mangli and the mass of the Chanda sandstones, 

 together with an immense mass of beds in the valley of the Godavari.f 

 The red shale of Korhadi I consider Talchir, and the white marble of 

 the same locality I refer to the metamorphic rocks. The latter here, and 

 throughout the plains of India, I believe to be of much older age than 

 any of the unaltered sedimentary rocks found in the neighbourhood of 

 Nagpur.J 



General Features of the Country, Geographical and Geological. 

 The neighbourhood of Nagpur has been so often and so well de- 

 scribed by previous writers that it is only necessary briefly to point 

 out its leading characteristics. The town stands upon the eastern edge 

 of the undulating trap country, the cantonment and civil station of 

 Sitabaldi being, for the most part, buUt upon the trap itself. The 

 country to the west does not rise into hills of any great height, though 

 it is interspersed with low ranges, and both these and the valleys between 



* Mr. Hislop in 1859, Q. J. G. S., vol. xvi, p. 159, so far modified his views as to class 

 the sandstone at the base of SitShaldi hiE with the overlying iutertrappean, but he still 

 considered it as the equivalent of the sandstones of Bokhara and of the Mahadeva hiUs. 



t See Becords, Geological Survey, India, 1871, p. 49. 



J It is only justice to Mr, Hislop to say that to any one unacquainted with the rocks 

 in other parts of India, as Mr. Hislop was when he commenced his explorations, the 

 Geology around Ndgpur presents unusual difficulties, from the circumstance that the 

 o-reater part of the country is covered by alluvium, and that the rocks are only seen at 

 all in a few isolated spots. Besides, when Mr. Hislop first wrote, scarcely anything 

 definite was known of the relations of the diffiarent sedimentary formations ; now, we have 

 the advantage of some 15 years' study of them by the Geological Survey. 

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