160 
workings would have to be unwatered, and sinking and cross-cutting- 
operations have to be carried out on an extensive scale, and several years’ 
work would be necessary to prove the value of the ground. 
The old workings do not appear to have reached below 1,000 feet, 
and the most promising way to test the ground at first would be by sinking 
ing to discover a repetition of the saddle reefs. Later on, the extension 
north and south of the known productive zone could be searched for, but 
this would entail much greater depths of shaft sinking than the search for 
recurring reefs. 
[.Report sent in 17.5.09.] 
GEOLOGICAL NOTES ON DEEP LEADS IN THE LODDON 
VALLEY. 
By E. J. Dunn , E.G.S., Director , Geological Survey . 
A Post-tertiary Fault in the Berry United Mine, near Clunes. 
In the Spring Hill and Central Leads Mine, which adjoins the Berry 
United Mine on the south, extensive subsidence has taken place to such a 
depth as to have rendered the working of the rich deposit of ancient river 
gravel impossible. The site of this subsidence is marked on the surface 
by an extensive hollow, and the shaft was sunk right in this area, with 
disastrous results to the shareholders. 
Underground in this mine the evidences of subsidence are very dis¬ 
tinct, and sections indicating this have been previously furnished ; they 
show the overlying basalts faulted down below the washdirt, pebbles from 
which have been carried down the fault between the basalt and Ordovician 
beds. 
In the Berry United Mine a most instructive section of a fault occurs in. 
No. 6 rise west of No. 2 Balance shaft. (Fig. 26.) A fault dipping 30 deg. 
Vertical Sections showing Post Tertiary Fault, in No. 6 Rise west of No. 2 
Balance Shaft, Berry United Mine, near Clunes. Scale 16 ft. to i inch. 
W. cuts through the alluvial deposits, and the underlying black and grey soft 
slates of Ordovician age that form the bedrock. In this case the displace¬ 
ment is not that found in a normal fault, but the rock on the upper 
side of the fault has been pushed upwards. The vertical rise amounts to 
9 ft. 6 in., measuring from the bottom of the wmshdirt below the fault 
to the bottom of the washdirt above the fault. A bore hole might be 
drilled so as to cut 4 feet of wash, then 5 ft. 6 in. of bedrock (soft 
slate), another 4 feet of washdirt, and then bedrock again; or, if the 
