19 W. BLANFORDj WESTERN INDIA. [PaRT I. 



are interesting, but he appears to have been inclined to assign high 

 o-eoloo-ical antiquity to the traps of India, and he comments upon the 

 resemblances they present to metamorphic rocks in their mode of 

 decomposition (?) , and the representation of the veins and strings {flons) 

 of quartz and amphibol in the latter by the veins of calcspar and 

 quartz in the trap {a). 



In two papers published in the transactions of the Bombay 

 Geographical Society {b), Major Stirling describes 

 ^^ ^°^' ' ' some of the geological features of the neighbour- 

 hood of Mundlaisur. The first paper contains observations on the alluvial 

 deposits of the Nerbudda valley and on the rocky barrier below Muhesur 

 (or Mheysur) at Sansadurra, which barrier, he considers, was formerly 

 complete, and formed the dam to a lake which covered the present site of 

 Muhesur. In the second note he describes the granite occurring in 

 the bed of the Nerbudda river at Mundlaism-, which he considers to 

 have been not transported boulders, but an actual protrusion of the 

 o-ranite through the trap. His description of the mode in which the 

 o-ranite and trap are intermixed is very careful and accurate, as is also 

 the account of the same given a few years later 

 Abbott, 1845. ^^ Captain Abbott, in the Jom-nal of the Asiatic 



Society of Bengal (c) . He arrived independently at the same conclusion as 

 Major Stirling. Both notice the manner in which the granite and trap 

 at the junction appear to blend into each other, and Captain Abbott 

 suggests that this may be due to both granite and trap having been in a 

 state of fusion at the same time. The examination of the ground by 

 the present survey has led to somewhat diiFerent conclusions, which 



(a). It is scarcely fair to criticise Jacquemont's remarks. He did not live to revise them, 

 and his diary was printed as it stood. Many errors would doubtless have been expunged 

 had he been able to prepare his papers for publication. 



(6). A visit to the falls of Sansadurra, Vol. VI, p. 5, 1841, and. Notice of granite 

 protruding through the trap rock in the bed of the river Nerbudda at Muudli'vsir, ibid., p. 7. 



(c). Vol. XIV, p. 821. 



( 17^ ) 



