42 



2. Section of cliffy at 226 miles from Blmichetown : — 

 Grey sand with thin layers of sand-rock, about 40 feet. 



Sand-rock 2 to 3 ft. 



Eed sand ... ... ... ... .... 10 feet. 



Total 52 feet. 



The whole more or less false-bedded. 



3. At Murthoo, 212 miles from Blanchetown. — The channel of 

 the river is, here, contracted and shallowed by a reef of ferrous 

 sand-rock, which forms the base of the cliff, whilst its main 

 mass is composed of a white, coarse, false-bedded sand. 



4. At Spring-Cart Gulhj, 164 miles from Blanclietown. — The 

 cliff at this place is the highest on the upper section of the 

 river, and consists chiefly of sharp sands, but has towards its 

 upper part a thickly-bedded freestone, consisting of angular 

 quartz grains cemented by amorphous felsitic matter. This 

 stone, which is used a» a building material, is comparable with 

 some of the softer felsitic quartzose sandstones of Pre-Silurian 

 age occuring in the Mount Lofty Eange. 



5. Pyap Heacli, 123 miles from Blanchetown : — 

 Eed and white clayey sand, sprinkled with 



mica-flakes, 

 Ked loamy clay 



6. Cliffy at 101 miles from Blanclietown : — 

 Beddish sands 



Dirty yellow or greenish sharp aands 

 Coarse quartzose sand-rock ; grains sub- 

 angular and coated with hydrated 

 ferrous oxide... 



Grey, angular, coarse sand 

 Hard calciferous sand-rock with a few 

 Older Tertiary fossils 



Total 



This last section is instructive, as it is the only one known 

 to me in which the actual superposition of the sharp fluviatile- 

 sands upon the marine beds is visible, though the same phe- 

 nomenon may be inferred at Overland Corner. This section is 

 distant in a straight line from Overland Corner four miles 

 only, and yet in that short distance the whole character of the- 

 stratigraphy has changed, as at the latter place the very high 

 cliffs consist of calciferous sandstone of marine origin, over- 

 lain by oyster banks, and these by blue clay. The evidence of 

 the niiconformability at Overland Corner is, I think, sufficiently^ 

 clear, as on the western flank of the scarped cliff there appears 

 at a little below the level of the oyster bank ferruginous 



