10 WYNNE : GEOLOGY OF KDTCH. [PAKT I. 



Lieutenant Merewetlier's report to the Superintendent of Harbour 



Worksj Kurrachee, mentions the kind of stone to 

 Merewetlier. 



be found in several places scattered over the west 



side of the district, but does not enter into geological details. 



The article in the ' Bombay Saturday Review ' treats of elevation and 

 Bomtay Saturday depression of the land, asserting rather strongly 

 ^®"'^"'" that " there is proof positive" that the Runn was 



within the historic period entirely beneath the sea, and that it is now 

 certain it is gradually sinking ; depending for corroboration of its being 

 an "upheaved sea bottom" upon a quotation from a report to Govern- 

 ment by Captain MacMurdo in 1815, and for that of its depression 

 upon several acres belonging to the village of Bheemkutta on the borders 

 of the Runn having been carried away by the sea during the two or 

 three years preceding 1866. 



It goes on to state that the flooding of the Runn by the sea is 

 imdoubtedly caused by volcanic action now depressing as it once raised it, 

 but advances nothing in proof of this, beyond the statement that volcanic 

 shocks in the Runn have been recorded by General Su- G. LeGrand Jacob. 

 By a somewhat bold theory, the ' evolution ' of Kattiwar, Kuteh and 

 the Runn is attributed to the accumulation of the deposits of the 

 Nerbudda, Taptee, Saubermuttee and Indus, by ocean currents, assisted 

 by volcanic action of elevation ; and the calculation of the Venerable 

 Archdeacon Pratt, that the attraction of the Himalayas raises the level 

 of the ocean along the western coast of India gradually up to 1,000 

 feet* on the coast of Sind, is adduced to show that slight oscillations in 

 the Himalayas and Hindoo Koosh Mountains would cause the Runn to 

 become again an inlet of the sea. 



* 5014-5'7feet is the exact calculation (Proc. Eoy. Soc, Loud., 1857). But Archdeacon 

 Pratt lias subsequently pointed out that he had only proceeded on an assumed density for the 

 Himalayas and suhjaeent mass; whereas the density as determined by experiment would 

 so modify the result as to render the effect on the sea-level almost imperceptible. 

 ( 10 ) 



