116 
Creek, 3J miles north-east of Roseneath. It is in the yellow slate of 
this age at Nolan’s Creek that silver bearing ores have been found. The 
lode strikes a little west of north, and the ore ranges from 3 inches 
to 1 foot thick. A tunnel has been driven upon it for a short distance, 
but has since caved in. The ore lying at the surface consists of car¬ 
bonate of lead with about 10 oz. of silver per ton. A sample taken for 
assay gave—Silver, 33 oz. per ton; lead, 47 per cent., and a trace of gold 
per ton. About 1 chain to the east is another small lode, on which a little 
work has been done. At this site the lodes could best be tested by means 
of a shaft. The Ordovician beds continue for 3J miles below the silver 
lode. At Wando Gorge, 10 miles north-west from Casterton, schists that 
probably represent Ordovician beds altered by granite occur. Along 
Nolan’s Creek, marble, in a belt of about 12 feet wide, is met with. 
[.Report sent in 12.6.08.'] 
STONY CREEK, NEAR HALL’S GAP, THE GRAMPIANS. 
By E. J. Dunn , E.G.S., Director , Geological Survey. 
Hall’s Gap is situated about 18 miles west of Stawell towards the 
northern end of the Grampians. The average dip of the sandstone on 
the east side of the Grampians appears to be about 9 deg. to the westward, 
but on the road from Hall’s Gap to Stony Creek the beds in places dip as 
much as 30 deg. to the west. The dip-slopes are bared and prominently dis¬ 
closed on the eastern side of Stony Creek near its junction with the main 
creek. On the Stony Creek Road, about half-a-mile from Hall’s Gap 
there are red, purple and grey sandstones and a thick sheet of rock 
resembling the Snowy River porphyry. White sandstone occurs above 
this. About 100 feet higher in the series and J-mile further along the 
road there is another large porphyry sheet, apparently intercalated with 
the sedimentary rocks. The jointing of the sandstones is well shown on 
the exposed dip-plane on the opposite side of the creek : the strike of the 
main joints is about E. 35 deg. N. The road passes a waterfall about 25 
feet high caused by the jointing, the strike of which is S. 12 deg. W. The 
joints are doubtless the cause of the north and south set of watercourses 
in this range of mountains. About 2J miles along the road from Hall's 
Gap, granitic rock intrusive into the sandstone is met with, and this rock 
forms the floor of the alluvial workings 3 miles from Hall’s Gap. Dredg¬ 
ing operations are being carried on at the site of old workings, but the 
results hitherto have not proved satisfactory. It is reported that some 
rich yields of gold were obtained here when it was first worked. 
About three-quarters of a mile south-east from this site is another 
old alluvial diggings called Klondyke. There has been only a little work 
done here, and the depth from surface to bed rock is about 21 feet, the 
bottom being decomposed granitic rock. This lead is of Tertiary age. 
Devil s Creek is about half-a-mile east of Klondyke. Here also only 
a little work has been done. Sinking is about 20 feet deep, through very 
rough and heavy bouldery wash. The bottom is decomposed granitic rock. 
High up among the sandstone some hundreds of feet above this spot 
and to the east of it, gold occurs which could not have been due to the 
presence of the granite. Where the granite is first seen on the road the 
beds of sandstone are altered to quartzite by contact metamorphism, show¬ 
ing the granite to be more recent than the Grampian sandstone. 
