PHYSICAL GEOGRAPHY. 57 



the depression continues right through Rewah territory and up all 

 the tributaries. Everywhere in fact the plains of recent deposits 

 are cut by deeply sunk drainage channels, and everywhere these are 

 seen to be cutting back into the recent deposits, which evidently 

 formed during a period when the action of the streams was different 

 to what it now is. 



This universal evidence of erosion points to a last [slight move- 

 Possibly due to human ment of elevation, but need not necessarily be 

 agency. attributed to that cause. It is doubtless closely 



related to the change, whether of elevation or climate, which has 

 led the Ganges and its tributaries to cut down into their deposits 

 and form the khudis land of the plains, and in the area now being 

 dealt with it is at least as likely that the change is due to the ex- 

 tensive clearing of forests which has taken place since the advent 

 of man as to a general movement of elevation, 



( $? ) 



