260 



On a reputed Coal Formation [no. 4, new series, 



a volcanic country, syenite and other forms of granite with mcta- 

 morphic rocks arc 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 Pamasala about 

 20 miles above Buddrachcllum, with the exception of one spot, 

 Riagoodum (right bank) G miles south of Buddrachcllum, where 

 the first appearance of a sedimentary deposit occurs. It consists 

 of beds of sandstone very various in texture, deeply tinged with iron, 

 and having veins of a harder sandstone, containing a larger per- 

 centage of iron traversing this mass in various directions. It is 

 very uneven in its bed and much disturbed, the average dip is to 

 N. W., in amount 20.° 



Between Farnasala 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. 



