S4. MALLET, VINDHYAN SERIES. 



Along the north-western boundary, in the neighbourhood of the Bunas 

 river, Mr. Haeket last season (1868) observed a vast 



Quartzite series. 



development of white quartzite sandstones, whicb are 

 uneonformably overlaid by the Kymores on the north-west and are brought 

 in contact with the Bundairs on the south-east by means of a great fault. 

 Similar beds also occm* in the hills west of Biana just beyond the limits of 

 the map, being there, as well as at the Bunas, interstratified with contem- 

 poraneous trap and more or less shale. The occurrence in these strata of jas- 

 per pebbles from the Gwaliors, and the unconformable superposition of the 

 Kymores, almost proves them to be intermediate in age between these two 

 formations, and they have provisionally been called, the ^quartzite series.' 

 The great Deccan trap covers a very large area of the Vindhyan 



rocks south of the Nerbudda to the east of Nee- 

 Newer formations. 



much and Burwai, stretching eastward nearly as far 



as Dumoh. It rests uneonformably on the denuded and sometimes 



distm'bed strata, and has itself suffered extensively from denudation, l^aviiig 



"a very irregular boundary with frequent outliers and inliers. The most 



easterly point which it attains is Kalumur hill above Kuttungee, which, 



rising to an elevation of 2,544 feet, forms the culminating point of the 



Vindhyan area. The boundary is sometimes, as east of Saugor, marked 



by a clear trappean escarpment, but in otber parts it is indicated by no 



physical feature. The Vindhyans have in places been somewhat altered 



immediately beneath the trap, but not to any very great extent. To the 



east and south-east of Saugor the infra- trappean or Lameta limestone' is 



largely developed, attaining a thickness of over 100 feet in places, but it 



varies greatly in this respect, sometimes being entirely absent, the trap 



then resting directly on the Vindhyans. The rolled pebbles which often 



make up a considerable portion of its bulk have been derived from the 



Vindhyan sandstones. These rocks have been discussed by Mr. H. B. 



Medlicott,* by Mr. J. G. Medlicott, t and by Mr. W. T. Blanford. t 



* Memoirs, Vol. II, p. 76. f Memoirs, Vol. II, pp. 196 to 217. 



X Memoirs, Vol. VI, p. 137. 



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