26^ On a reputed Coal Fonnaiion [no. 4, new series, 
extent of mottled clays, these again outcropping at Sironcha where 
we have left the main stream of the Godavery for its tributary the 
Pranheeta, these are the immediate underlyers 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 Fcrt stands upon a hill, the side of which to- 
wards the river presents a steeply scarped face, and good section 
of these clays, they are 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 interstratified 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 atKota 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 AnnumpuUy and Sumpatum, here we have a 
A\hitish 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 
