BUNDELCUND. 85 



In the valley of Heerapore I met with a superficial iron deposit, not 

 like that in the Tons, it has less the stamp of a sim- 

 ear eerapore. ^ mechanical rock, being almost pure pisolitic iron 



oxide ; there is a low hill of it about 400 yards to north-east of the Dak 

 Bungalow, it rests often on the limestone. In the immediate neighbour- 

 hood of the Bijawur rocks so highly charged with iron, a deposit of this 

 kind is easily understood. 



A more special study of these superficial rocks may establish that the 



„,,',, patches of basalt I have noticed at Mudunpoor 

 Age of the low-level r 



Tra P- and Tingunnah belong to the younger of the two 



trappean series, which has been described as filling in the valleys of the 



older one ; this fact if proved, would simplify somewhat the arguments 



relating to the denudation of the Vyndhyans; I did not however see 



any rock that clearly took this position, nor at these two localities did 



the nature of the rock suggest any such difference, the only hint being 



that the white siliceous limestone was not seen ; but this does not prove 



much, for even were it a prelateritic trap, one would most naturally 



suppose different conditions at this lower level. The presence of this 



trap there, almost necessitates that at that remote 

 Consequences. . . ' . . 



time most or the (jangetic valley and also this bay 



of lower Bundelcund had been excavated, the beds of trap being close 

 under the scarp at the very innermost part of that bay ; if then the fresh- 

 water limestone were associated with it, we should have to extend inde- 

 finitely the already enormous area of this lake ; even as it is, we can 

 hardly avoid this difficulty, for if the upland trap were as has been supposed 

 formed under fresh water, what was there to prevent the spread 

 of the latter wherever the trap reached to ; the subaerial formation of 

 most of the trap may thus be established. We will then provisionally 

 conjecture that there may have been oceanic water over this low ground. 

 In either case the position is interesting on the score of the basalt itself; 

 there is no known source of this igneous rock on the low country, 



