XXXIV 
(iEOLOGICAL FEATURES. 
To the westward of the creek, another species 
of acacia was remarked for the first time. Both 
shrubs, like the blue-gum and the box, mixed 
their branches together, but the creek formed 
the line of separation between them. The aca- 
cia pendula was not afterwards seen, but that 
which had taken its place, as it were, was found 
to cover large tracts of country and to form ex- 
tensive brushes. Many other peculiarities in 
the vegetation of the interior are noticed in the 
body of this work, but I have thought that these 
more striking ones deserved to be particularly 
remarked upon. 
If we strike a line to the N.W. from Sydney 
to Wellington Valley, we shall find that little 
change takes place in the geological features 
of the country. The sand-stone of which the 
first of the barrier ranges is composed, ter- 
minates a little beyond Mount York, and at Cox’s 
River is succeeded by grey granite. The se- 
condary ranges to the N.W. of Bathurst, are 
wholly of that primitive rock ; for although there 
are partial changes of strata between Bathurst 
and Moulong Plains, granite is undoubtedly 
the rock upon which the whole are based : but at 
