£63 On a reputed Coal Formation [no. 4, new I1RXBS, 



extent of mottled clays, these again outcropping at Sironcha where 

 we have left the main stream of the Godavcry for its tributary the 

 Pranhccta, these are the immediate undcrlyers of the limestone beds 

 at Punkenna as inferred from their relative position and their dip, 

 and subsequently confirmed by the boring to be the case. 



At Sironcha the Fort stands upon a hill, the side of which to- 

 wards the river presents a steeply scarped face, and good section 

 of these clays, they arc here very hard, very various in colour from 

 a deep red to a fine pink and grey, they dip to the N. E. or N. 

 N. E. about 20°, they consist of layers of 3 to 6 feet in thickness, 

 the lowermost layers being intcrstratificd with the uppermost beds 

 of the sandstone series beneath. 



At Nuggrum, a well exposed section of this sandstone shows 

 that the alternation with these clays has ceased, as also on the op- 

 posite bank of the river we have still lower beds of sandstone with- 

 out clays. 



Proceeding again up the river, the Sironcha clays are seen to 

 continue for some little distance on the left bank, exposing beds 

 above those at Sironcha, they assume a much deeper red colour 

 here, on the right bank we have the sandstone occasionally ap- 

 pearing. 



The limestone at Kota is the next rock to be seen, it has a N. E. 

 dip of about 5°, the general inclination of the beds from the En- 

 champilly barrier to this point. 



The banks of the river for some distance are now alluvial soil, 

 until the villages of Annumpully and Sumpatum, here we have a 

 whitish sandstone with a layer of red clay; in the bed of the river 

 immediately above this point I observed lumps of limestone and 

 red clay in appearance closely resembling the beds at Kota, the 

 stone is not any where on the banks exposed in situ, but from the 

 fragments found being large and angular, not worn at all on their 

 edges their position is without a doubt at this place and outcrop 

 only concealed by the water. 



This is the last point in my observation along the river of the 

 unaltered sedimentary rocks, those next exposed are metamorphic 



