MALLET, VINDHYAN SERIES. 21 



altitude of Kuttungee, a town near the watershed, is 1,350 feet, but the 

 Nerbudda at Hoshungabad is reduced to 1,050, and the Sone at Akbar- 

 pur to 400. Proceeding hence along the northern limits of the forma- 

 tion, we find the Gangetic plains at Allahabad only 300 feet above the 

 sea, and the crystalline area of Bundelkund considerably less than 1,000. 

 Except an insignificant surface drained by the Nerbudda, the 



whole area occupied by the Vindhyan rocks belongs 

 Drainage. 



to the basin of the Ganges. The Sone flows 



through the country of the lower division of the series, while the 



Karumnassa, the Tonse, and the Kane carry off the superfluous waters 



from the upper Vindhyan area east of Saugor. North and north-west 



of this town, the Dessaun, the Betwa and the -Sind flow across the 



sandstones on their way from the trappean area to the plains of the 



Ganges, while the Gwalior country and all the western extension of 



the Vindhyans is drained by the Ghumbul and its various affluents. 



21 



