260 On a reputed Goal Formation [no. 4, new series, 
a Tolcanic country, syenite and other forms of granite with meta- 
morphic rocks are only to be seen for a considerable distance. The 
river here passes through a narrow valley termed the Gorge, formed 
by an apparent fissure in the range of altered and volcanic rocks. 
This character of country continues till we reach Parnasala about 
20 miles above Buddrachellum, with th^ exception of one spot, 
Ptiagoodum (right bank) 6 miles south of Buddrachellum, where 
the first appearance of a sedimentary deposit occurs. It consists 
of beds of sandstone very various in tex/ure, deeply tinged with iron, 
and having veins of a harder sandstone, containing a larger per- 
centage of iron traversing this mass in various' vlirections. It is 
very uneven in its bed and much disturbed, t*iie average dip is to 
N. W., in amount 20.° 
Between Parnasala and Lingala we again have sedimentary beds, 
consisting of very coarse conglomerates and breccias, the latter 
containing angular fragments of limestone. 
The course of the river is now for some distance entirely through 
a country formed of stratified rocks, the out-croppings of which 
are at frequent intervals to be seen projecting into the stream and 
on its banks. 
These sedimentary beds extend into the country on the right 
bank only, on the left bank a range of hills composed of metamor- 
phic rocks extend along the course of the stream. These consist 
of sandstones that have undergone various amounts of alteration in 
some places rendered only partially crystalline by the action of the 
volcanic heat, whilst in others their original character is entirely 
lost, generally they do not show any violent disturbance except at 
particular places, these are at Buddrachellum, Enchampilly and 
Aheree, and form the points of obstruction in the navigation of the 
stream. The stratified rocks seen on the right bank consist of 
series of sandstones in general character, resembling that already 
described as occurring at Riagoodum. They are occasionally much 
disturbed and contorted, in one place opposite Nargarum, they are 
standing vertical, the surface of beds being scored and polished by 
the attrition of the beds upon one another where however a gene- 
ral inclination of the beds is to be ascertained, it is to the W. 
