NERBUDDA DISTRICT. 1*7 



They are known to occur again at the surface to the westward in 



the Kalibete Hills, and have been described near Ellichpur, but as far 



as the area included in our map is concerned, the 

 W. boundary. 



trap bounds them on the west. 



The sandstone area, of which we are now speaking, is bounded on the 

 south by a line nearly parallel to its north boundary. This south bound- 

 ary line stretches for 70 or 80 miles also in a 

 S. boundary. . 



very rectilinear direction, from about the meridian 



of Betul to that of Chindwarra station, lying a few miles to the north of 



both these places. Thus bounded on the north, 

 E. boundary. 



west, and south respectively, this sandstone area 



is limited on the east (as on the west) by the overlying trap. Rocks of 



the same formation have been described as occupying large areas in the 



Nagpur country, but these are beyond the limits included within our map. 



Passing to the eastward from the eastern limit above indicated, that is 



„ L . „ xl roughly, from the meridian of Nursingpur and 



Extension ol the same ° J er 



rocks to the east. Chindwarra stations, only a narrow strip of 



ground will be found occupied by rocks of the Damuda and Mahadeva 



groups. They are very continuous along their northern boundary, but 



no where are they found to extend far from it to the south, until we 



come to the valleys of the Mahanuddi and Johilla, where they once more 



spread over a wide extent of surface. All along, their limit in the 



southern direction is marked by the overlying trap of the Seoni, Mund- 



lah, and farther on, of the Sohagpur districts. We shall now proceed to 



describe these formations in detail, and in ascending order. 



These rocks are exposed in several places at the base of the range of 



Hills which bounds the Nerbudda Valley on the 

 Area of the Talcheer. 



south, and principally at the entrance of gorges 

 communicating with the valleys of the interior of these ranges. The 

 area occupied by them is only seen in detached, and often small patches, 

 most of these being in places where the rocks of newer formations have 



