286 Dr. Voy serfs Private Journal [No. 4. 



rock is granite of a grey colour with a considerable quantity of quartz 

 and very little mica. It encloses masses of micaceous granite as usual, 

 some of which are bent into various forms, differing probably from the 

 original, and when they were in a semifluid state. I saw also on differ- 

 ent parts of the summit and sides red granite with large crystals of 

 felspar, also enclosing the lumps of micaceous granite. The hills- to the 

 eastward of this station present one continued waving outline of forty 

 or fifty miles in extent, gradually diminishing in height to the N. where 

 they become flat and present openings in their course, not very dissimilar 

 from those in the environs of Beder. At their highest part they pre- 

 sent two or three small peaks, but their general outline is waving with- 

 out the ruggedness of the granite. 



Yesterday I went to see a quarry of calc tuff about three miles to 

 the N. "W. of Ingourtee. It differs very little from that so commonly 

 spread in this country. 



Wednesday, 15th September, 1819. — We passed through a defile in 

 a range of mountains running nearly North and South composed of 

 granite, with quartz rock strongly impregnated with iron lying over it. 

 On the descent from the opposite side I observed clay slate, but not in 

 distinct strata, until I had advanced about one mile and near to a river, 

 when it appeared at intervals running horizontally or with a slight in- 

 clination. 



In the bed of the neighbouring river, I observed bits of granite, lime- 

 stone, clay slate, quartz rock and agate ; its banks being about 15 feet 

 in height and alluvial soil. 



Thursday, \6th September, 1819. — Our camp was this day pitched 

 in the neighbourhood of a nullah which was at the foot of a range 

 of small hills, and on the banks I perceived clay slate in large masses 

 without regular stratification and lying on alluvial soil. The bed 

 of the nullah consisted of quartzos esand. We passed through on 

 our way to Commerarun, winding through the vallies formed by the 

 broken ranges of mountains, a fine alluvial tract, the substratum being 

 only visible at intervals, which at all times and without any perceptible 

 difference of level was clay slate, sandstone and quartz rock. Near to 

 Commerarun in passing through a defile composed of an alluvial red 

 clay, I observed on the surface, numerous agglutinations of ironstone 

 very much resembling the iron clay, the ground being at the same 



