252 
APPENDIX. NO. I. 
Chrystallized Sulphate of Lime.— Found imbedded in the deep 
alluvial soil in the banks of the Morumbidgee River, in lat. 
34° 30' S., and long. 144° 55' E. The same substance 
was found on the banks of the Darling, in lat. 29° 49' S., 
and in long. 145° 18' E. 
A reference to the chart will shew that the Morumbidgee, 
from the first of the above positions, may be said to have entered 
the almost dead level of the interior. No elevation occurs to 
the westward for several hundreds of miles. A coarse grit 
occasionally traversed the beds of the rivers, and their lofty 
banks of clay or marl appear to be based on sandstone and 
granitic sand. The latter occurs in slabs of four inches in 
thickness, divided by a line of saffron-coloured sand, and seems 
to have been subjected to fusion, as if the particles or grains 
had been cemented together by fusion. 
The first decided break that takes place in the level of the 
interior occurs upon the right bank of the Murray, a little 
below the junction of the Rufus with it. A cliff of from 120 to 
130 feet in perpendicular elevation here flanks the river for 
about 200 yards, when it recedes from it, and forms a spacious 
amphitheatre that is occupied by semicircular hillocks, that 
partake of the same character as the cliff itself ; the face of 
which shewed the various substances of which it was composed 
in horizontal lines, that if prolonged would cut the same sub- 
stance in the hillocks. Based upon a soft white sandstone, a 
bed of clay formed the lowest part of the cliff ; upon this bed 
of clay, a bed of chalk reposed; this chalk was superseded by 
a thick bed of saponaceous earth, whilst the summit of the cliff 
was composed of a bright red sand. Semi-opal and hydrate of 
silex were found in the chalk, and some beautiful specimens of 
brown menelite were collected from the upper stratum of the 
cliff. 
