123 
formed along Morass (Murphy’s) Creek, and to the west of it across the 
present course of the Gibbo River and down the eastern side of the pre¬ 
sent course of the river. 
Above the limestone bluff on the Mitta Mitta River sub-basaltic wash 
is exposed, and there is a thick capping of basalt over it. This wash has 
not been tested, although it deserves attention. Three miles further down 
the river, on the eastern side, is an old hut and enclosure; a short dis¬ 
tance from this hut and a little higher up, a very heavy wash has been 
worked to a small extent. The boulders are in many cases over \ ton in 
weight, and extremely well rounded. It is evident that a fair amount of 
gold was obtained or this work would not have been accomplished; but 
the wash worked is not in its original position; it has slipped down the 
slope and become commingled with basaltic nodules. An adit should be 
driven into the gutter at this point, and the wash in its original position 
should be tested. This is the lower end Of the gutter, so that there will 
be no difficulty as regards water. From the nature of the wash it 
must be very extensive, and the river which rolled down such boulders 
must have been a long and powerful stream. The testing of this high- 
level old lead is a work of great importance to mining, for if the wash 
contains sufficient gold to pay, work would probably be provided for 
hundreds of miners. This tract of country requires fuller examination. 
Between Dark River and Wombat Creek on the Mitta Mitta, there still 
remains alluvial ground suitable for individual miners or for small parties, 
where, at little initial expense, some gold may be won. As such sites are 
now exceedingly scarce in the State, it seemg desirable that this tract 
should be exempted from leasing, and should be reserved for a class of 
miners who have great difficulty in finding claims. 
The heavy sand found in the river bed above Dark River gave 3 per 
cent, of monazite and this contained 4.5 per cent, of thoria. 
\_Re-port sent in 23rd March, igo6.\ 
LIMESTONE DEPOSITS AT WOMBAT CREEK AND THE 
MITTA MITTA RIVER. 
(NO. 19 ON LOCALITY MAP.) 
By E. J. Dunn , F.G.S., Director , Geological Survey. 
At Limestone Gap, through which the track over the divide between 
Toak’s Creek and Wombat Creek passes, there is an outcrop of bluish-grey 
marble or compact limestone, permeated in places by thin quartz veins. 
This rock is not suitable for ornamental purposes. From the Gap south¬ 
eastward to the Mitta Mitta River, other outcrops of limestone occur. 
The outcrop at the Gap is about 200 feet, both in length and breadth. 
The limestone appears to dip almost vertically. To the westward and 
stratigraphically below it, there is a series of sandstones and slates, ap¬ 
parently Silurian. These rocks rise to the west of the outcrop to form 
a main range that is the northern continuation of the Mount Wills belt of 
country. An extensive area of Devonian conglomerate occurs, stretches to 
the east, and appears to lie immediately above the limestone. 
A small tributary runs down from the Gap to the Wombat Creek; it 
is about 1 mile in length. The track follows this and crosses Wombat 
Creek about 1,500 feet above sea-level. One and a half miles from the 
Gap, on the southern side of the creek, is another outcrop of bluish-grey 
compact limestone, about' 5 chains long, and about the same width; a little 
