Formations of New South Wales. 351 
Gold drifts which are by Mr. Selwyn referred to Upper and 
Middle Tertiary, yet there are parallels in New South Wales 
to certain phenomena that have been observed in that province. 
Thus, the gold alluvia of the Uralla resting chiefly on granite 
are covered by a great thickness of basalt, as in various Victo- 
rian fields, and at Lucknow, near Orange, as well as at Uralla, 
under the basalt and with the gold alluvia are found stems and 
branches of trees, as is the case at Daylesford, in Victoria, 
These may be Miocene, or perhaps Pliocene, but the proof 
must rest on evidence not yet attainable. 
PLEISTOCENE AND RECENT ACCUMULATIONS. 
In many parts of the existing region, all over the surface, 
wherever the basal rock is not denuded, as near Sydney, there 
are local deposits which might be called “till,” were any 
tacea found in them; and in the interior there are widely-spread 
accumulations of drift pebbles, which, as on the Hunter and 
Wollondilly, are rounded by attrition in their long journey 
om the mountains whence they have been derived. Sometimes, 
— the breaking up of conglomerates has contributed to this 
ift 
and bivalve shells are found in some cases attached to the bones, 
or deposited over them in a regular series of layers, at interval 
of several feet; and of these shells some are yet living in the 
water-holes of the creeks. These facts are generally known, 
but it was not till recently that the osseous relics have been 
found in different creeks throughout the whole of the slopes and 
plains at the base of the Cordillera in Eastern Australia. 
Similar to this are the accumulations of bones in caverns, as 
at Wellington—at Boree, near the head of the Colo river—at 
Yesseba on the Macleay river, and other places. | 
In the Exhibition is a magnificent collection made by Mr. 
Krefft. from the former locality, and several specimens of (See 
Nos. 483e & 469.) 
breccia from the latter place, discovered by Mr. Rudder. Bee 
. 
