508 
DR. stranger’s 
The sandstone is fine granite, and composed of transparent 
particles of white quartz. The upper beds are highly ferrugi- 
nous. The strata are cut through by joints running in all direc- 
tions. In a cave north-east of Iddah, the sandstone occurs in 
horizontal strata, and shows well the appearance of false stratifi- 
cation, being cut across diagonally and very regularly by nume- 
rous parallel lines, having the appearance shown in the section A ; 
between the diagonal lines, there is a thin layer of peroxide of 
iron 
After very careful examination, only one obscure fossil, 
having some resemblance to a Pollicipes, was detected in the 
sandstone. The cliffs of Iddah are formed by the outcrop of a 
ridge of hills running N.E. and S.W. 
From Iddah to Kirri, the country is composed of the same 
sandstone, which is more or less ferruginous in places, and which 
forms elevated table-lands, bounded by cliffs and masses of 
debris. 
At Kirri, mica slate occurs, dipping at an angle of 85° west. 
These strata on the right bank stand up in high masses, having 
the appearance of leaning walls. Opposite Kirri, in the bed of 
the river, is the '^Bird rock,’' which is a mass of white quartz, 
evidently embedded in the mica slate. From Kirri to Adda- 
Kudda, the hills are granite, on the south side of which the mica 
slate rests, but the jioint of junction from the river could not be 
seen. These hills, which have been called the “Kong Moun- 
tains,” do not attain a height of more than 1200 feet, of which 
Mount Soracte appears to be the highest. Beaufort Island is of 
granite, much decomposed on the surface, which is rough from 
the projection of felspar crystals. This granite contains little 
mica, and is composed of felspar and quartz, with a small quantity 
of hornblende. The blocks of granite are piled one upon 
another like masonry, and the soil between them is a rich loam. 
At Okaze, the granite is large crystalline, and contains very 
beautiful opalescent felspar. 
At Adda-Kudda, the granite is mixed up and complicated with 
gneiss, which generally dips at an angle of G0° to the south. 
The granite forms veins running into the gneiss in all directions, 
and in some places the granite contains embedded masses of 
gneiss. 
