117 
is Silurian sandstone, with a little slate. It is very much disturbed and 
•crushed, so much so that there is difficulty in recognising the true bedding 
planes. Along the course of the adit, which it has taken several years 
to drive 2,800 feet, two shoots of auriferous quartz have been cut, one of 
them 200 feet in length, the other 600 feet. Near the end of the adit 
the country is much disturbed and bent southward, the result of a fault. 
As the course of the adit was deflected from the supposed' position of the 
lode being driven for, a cross-cut was started 550 feet from its end, and 
driven in a north-easterly direction. At the time of my visit this cross¬ 
cut had passed through 172 feet of intensely hard sandstone, and there 
still remained 800 to 900 feet to be driven. At the mouth of the adit 
the plant consists of a 4|-h.p. Otto oil engine and dynamo, by which 
means an electric drill is worked, and the face lighted. By means of a 
fan and 12-in. piping, air is driven in to the face also. The height of 
the mouth of the adit above the Crooked River is about 650 feet. Be¬ 
tween the Good Hope workings and Grant is the Magenta reef, which may 
be the eastward continuation of the Good Hope reef. This reef has been 
worked from several shafts. 
Mr. A. E. Noble has kindly supplied the tracing, showing position oi 
the several adits, &c. 
{Report sent in 4th April, igo 6 .] 
THE LONE HAND AND ROYAL FLUSH REEFS, GRANT. 
(no. 16 on locality map.) 
By E. J. Dunn , F.G.S., Director , Geological Survey. 
The Lone Hand Reef. 
About f mile eastward from Grant this reef crosses Mornington Gully. 
The strike of the reef is W. 30 deg. N., and its dip about 75 deg. S.W. 
T he country-rocks are altered sandstones and slate of Silurian (?) age. 
Associated intimately with the reef is a diorite dyke. A fissure has ap¬ 
parently been filled with the molten igneous rock which contracted on 
cooling, and left spaces on one or both sides, between it and the enclosing 
sedimentary rocks. These spaces became gradually filled with quartz from 
solutions, the gold being deposited at the same time. 
The dyke is 2 feet thick, and the quartz reef ranges from 5 inches to 
2 feet. The walls have not been smoothed by friction, but are rough, as 
though they had been torn asunder, and the resulting fissure immediately 
filled with igneous matter. The quartz is well laminated, and gold shows 
freely in places. The gold is worth £4 is. 6d. per oz. The Lone Hand 
reef has not been long opened up, but its westward continuation, known 
as the Jolly Sailor’s reef, was formerly worked with success for a length 
of 200 feet. At the eastern end of the Jolly Sailor’s reef there is a 
fault, which has thrown the eastern portion, or Lone Hand reef, 37 feet 
to the south. This reef is traceable for over 700 feet. It was in con¬ 
sequence of this fault that the Lone Hand portion of the reef was not 
previously worked. From the nature of the occurrence and its resemblance 
to the Union reef at Diamond Creek, it may be expected to be quite per¬ 
manent to great depths. The conditions that are most favorable to the 
presence of auriferous reefs in Silurian rocks are the existence of dykes, 
and these prevail in the neighbourhood of Grant, hence the presence of 
auriferous reefs. 
