697 
“ Numerous cracks and joints divide tlie rock into small, rougk prisms ; and 
especially is this the case in the neighbourhood of the basaltic rock, where the sandy 
shales have seemingly separated into rough spheroids. The beds are traversed by a 
number of small faults, striking S.E., S.S.E., and S. 10 E., the largest displacement 
noticed not exceeding eight feet. . xu r 
“ As by far the greater portion of the formation is covered by alluvium, the dip 
of the beds and strike of the faults and joints can alone be noticed in a few localities, 
and where they have been exposed by denudation the bedding planes are not sufficient y 
defined to allow of accurate measurements being taken The beds are generally 
horizontal, undulating slightly, and where they are inclined they dip at varying angles. 
“In Mr. De Winton’s paddock, Corinda, adjoining the river bank, this series, 
which is there horizontal, is seen resting unconformably on a series of coarse, gritty 
sandstones and conglomerate, belonging to the so-called Ipswich Beds. 
“These Tertiary deposits occupy a considerable portion of the depression, 
extending from Sherwood, on the Southern and Western Eailway Line, to beyond 
Euncorn Station, on the Logan Line. Outcrops of the coarse gnts and conglomerates, 
apparently of a different geological age, occur in several places, rising above the level ot 
the valley, forming extended ridges and hillocks. 
“ Most of these beds contain monocotyledonous and dicotyledonous plant remains, 
which may be referred to some period of the Tertiary epoch, lu the shales and clays, 
the venation of the leaves and stems of the plants are sharply defined, and their 
outlines well marked in the remaining beds, but few of the^^impressions are well 
preserved, their exterior outlines being with difficulty discernible. , , ,.,i , • i 
I have gone over the section carefully, and can see no m.arked lithological 
distinction between the strata from which Mr. Stokes obtained his fossils and many 
other well-known beds which unquestionably form part of the Ipswich Coal Measures ; 
nor can I sec any evidence of an unconformability of more importance than many local 
unconformabillties which occur in the Ipswich Beds. I should incline to regard Mr, 
Stokes’ fossils as additions to the flora of the Ipswich Eormation rather than as evidence 
of the presence of Tertiary strata. The whole quesUon can, however, remam in 
abeyance pending Baron von Ettingshausen’s determination of the fossils. 
MINES IN CONNECTION WITH THE TERTIAET EOCK.S. 
RUSSELL RIVER GOLD FIELD. 
This is a recently opened alluvial field which is likely to rise into importance. 
Its centre is about six miles west of Mount Bartlo Frero. The gold is found associated 
with fine-grained stream tin ore in a gravelly wash beneath basaltic flows, about 2 500 
feet above the sea-level. This basalt forms part of the tableland which extends from 
the heads of the Eussell, .Tohnstone, and Mulgrave to the basin of the Barron near, 
Herberton, and is covered with dense tropical jungle and intersected by plentiful 
running streams. It prob.ibly dates from Miocene times, but of this no direct evidence 
has yet been observed. Wairambar Creek, on the west, and Cooppooroo Creek, on 
the east, have cut through the basalt, exposing the underlying auriferous drift and 
the “ bedrock ’’ of slates, schists, and groywackes. Extensive preparations for sluicing 
the drifts have been made, and as the area covered by the basalt is enormous, and the 
drift has been exposed, owing to the accident of denudation, merely on the fringe of the 
deposit, almost unlimited possibilities are before the field. The 
washdirt reported in Victoria for 1883 was 1 dwt. 23-32 grams; for 1884, 3 dwts., and 
for 1885, 1 dwt. 10-59 grains. I am certain that the Terraces of the Eussell will give a 
