239 
THE NEW WORKING MINERS MINE, CRESWICK. 
By E. j. Dunn , F.G.S., late Director, Geological Survey. 
This mine is about i mile east of the Post-office, Creswick, and the top 
of the shaft is about 1,760 feet above sea level. The shaft is 400 feet 
deep and on the east side of a steep gully. The country rocks are Ordo¬ 
vician slates and sandstones, grey and yellow in colour. Just east of the 
shaft the beds dip east, while) in the gully a short distance to the west of 
it the beds dip west, so that the shaft is sunk close to centre country. A 
tunnel was driven into the hill (which rises to 200 feet above the shaft 
mouth) about 3 chains south of the shaft, and apparently quartz spurs were 
worked in eastern country both in the tunnel and in the east cross-cut from 
the shaft. The shaft is apparently in fair order but all the plant has 
been removed. From a former underground manager the following par¬ 
ticulars were obtained. In the shaft at 112 feet cross-cuts were extended 
for 30 feet to the east and 30 feet to the west. At 140 feet a cross-cut was 
extended east for 50 feet. At 200 feet a cross-cut was extended 50 feet to 
the east and another 70 feet to the west. At 300 feet a cross-cut was 
driven east for 100 feet, where a flat make of quartz was worked. At 
400 feet a cross-cut was driven east for 100 feet and west for 100 feet, 
and quartz veins were cut and worked in the east cross-cut. Particulars as 
to yields of quartz and of gold were not obtainable, but a considerable 
amount of profitable work is said to have been done in this mine. The 
shaft appears to be in a favorable position for prospecting by sinking and 
cross-cutting for any “legs” or auriferous spurs. 
[■ 29.11.07 .] 
THE SOUTH STAR MINE, BALLARAT WEST. 
By E. ]. Dunn , E.G.S., late Director , Geological Survey. 
This mine is situate about 2 miles south of Ballarat on the Sebastopol 
Plateau, and is one of a group working the western lines of reef. 
There are three lines of lodes, known as the Consols, the Guiding 
Star, and the Albion (the most western); they strike in a north and south 
direction and conform to the strike and dip of the beds of Ordovician 
sandstones and slates that form the country rock. 
Each of these lodes consists of quartz in black slate, and the result 
of the geological survey being carried out by Mr. Baragwanath goes to 
prove that the three lodes are on the same band of black slates inter¬ 
calated with slates and sandstones of grey colour with a total thickness 
of about 100 feet, and with three or four thin seams of the black slate 
ranging from 1 inch to 3 inches wide through it. It is the lowest of the 
black slates or the bed on which the Consols lode was worked that is the 
productive indicator in this mine. 
The whole of the Ordovician slates and sandstones are bent over into 
a series of anticlines and synclines in Ballarat West, but unlike the 
Bendigo beds, which form well-arched folds, the Ballarat West beds are 
bent into a series of acute-angled folds as shown on the accompanying 
section, PI. XLII. 
Conforming to all these sharp bends is the band of black slates, and 
in this band and on the bottom slate bed the quartz veins that have vielded 
such great wealth in gold have formed. 
