106 
On the northern side , of Tin Creek, between it and Bishop’s Creek, 
an older alluvial drift, composed largely of well-rounded pebbles of 
sandstone, occurs. This appears to be of Newer Pliocene age, and its 
floor is higher than the present creek bed. It is well developed about a 
quarter of a mile above the camp. Some holes have been sunk here to 
depths of from 6 to 20 feet, but no systematic tests appear to have been 
made to prove the value of the tin ore and gold per cubic yard. 
A section disclosed in one of these holes (not bottomed) is as under: — 
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Fig. 25. 
Section near the Head of Pipe Track, Tin Creek, near Buxton. 
This older drift is extensive, and has no doubt been deposited by 
Bishop’s Creek or its former representative. From Bishop’s Creek the 
water supply is obtained for hydraulic treatment of the drifts of Tin Creek. 
The tin ore that occurs in the older drift has doubtless come down the 
valley, and, therefore, it should be more plentiful and in larger grains 
nearer the source. Prospecting should be done further up towards the 
granite boundary. Although a considerable amount of money has been 
spent on Tin Creek the value per cubic yard of the old gravels has not 
been demonstrated. 
This could be done by taking out a paddock near the pipe track, and 
estimating the value of the tin ore and gold saved by washing away a 
measured block of ground. The price of tin is abnormally high at pre¬ 
sent, and the ore is, therefore, well worth searching for. There is an 
extensive outcrop of granite—some 30 miles long' by 20 miles wide— 
to the east of Buxton. The granite area and the area of the contact with 
the Silurian rocks deserve prospecting. To the west of Buxton is a 
smaller area of granite, and this tract also should be tried. Mr. Passing, 
who is in charge at Tin Creek, conducted me over the workings. 
About \ mile N.E. from Buxton there is a large granite block resting, 
so far as can be seen, on alluvial ground. Probably it has rolled down 
from the high range to the east and come to rest in its present position. 
The side facing the north suggests that it was formerly the base of the 
mass, for it is not much weather-worn, while all the remainder of the 
surface is well rounded. Roughly this block is 42 feet long and 36 feet 
wide at its widest part, and about 22 feet high at the highest point. 
The weight cannot be far short of 1,000 tons,. It is a remarkable object, 
and bears a rude resemblance to a sea elephant. It might be called 
Sea Elephant Rock. I am indebted to Mr. Rvall for the photograph here 
reproduced. 
