july— sept. 1857.] at Koto, on the Godavery. 259 



that the probabilities were against Coal being found in them or 

 otherwise. 



On my arrival at Kota, I found I was still in the same series of 

 sedimentary rocks I had been passing over in my journey along 

 the river, and was fortunately soon able to identify the limestone 

 at Kota under which the Coal was presumed to exist, with the 

 limestones I had observed at other places on the river, one of 

 which was at a point 80 miles lower down. 



This limestone although seen cropping out at several places on 

 the river — at Yeytoor, a village, 2 miles below Chintagorem, at a 

 point on the left bank opposite Pallemella, (Warrugoora,) and sub- 

 sequently as I discovered at a place a little north of Kumalapet- 

 ta, I had not been able to observe beyond a very small extent in 

 thickness, I therefore proceeded on arriving at Kota to carry out 

 my original intention to start my people to bore, and immediate- 

 ly selected a site upon this limestone which offered the best facility 

 for carrying on the work. 



A Sketch Map* showing the nature of the rocks and their incli- 

 nation as indicated by an arrow pointed in the direction in which 

 they dip is herewith appended, the dark blue line shows the out- 

 cropping of the limestone. 



At Dowlaishwerum there are sedimentary deposits, consisting of 

 a series of thin layers of very bright colored clays, above this a 

 very irregularly stratified sandstone, of various degrees of hard- 

 ness, a very small extent of this sandstone now remains in this 

 district in isolated hills, it having been removed by the denuding 

 action of water from the intervening valleys, its thickness does not 

 seem to be very great about 50 to 60 feet, this and the underlying 

 clays appear to be the result of the decay and washing of the vol- 

 canic hills lying to the north. 



This character of formation extends to Rajahmundrj'. 

 Proceeding thence along the course of the Godavery, the banks 

 consist of alluvial deposits until we reach Polaveram, we now enter 



* Vide Plate I. 



