78 
The effect of the faulting at Spring Creek has been remarkable ; in one 
section a hole sunk from the original surface would pass through 20 feet of 
clays and gravel, then through 4 feet of rich auriferous washdirt, 18 feet 
of decomposed granite, 4 feet of rich auriferous washdirt, and bottom on 
altered Ordovician slate and sandstone. 
This and other sections are shown in 
the figures. Where the fault passed 
through the washdirt it was slicken- 
sided, but the fault did not sever the 
pebbles. 
There were no surface indications 
of the displacement caused by the 
fault, while the Tertiary beds were 
displaced by it, so that its age must be 
later than Newer Pliocene and older 
than the latest Recent; it may have 
been in the Post Pliocene period or 
early Recent. A section showing the 
manner in which the break has been filled in with Recent material would 
be of great interest, but unfortunately the whole of the surface deposits have 
been removed by sluicing operations. 
Fig. 34.=—Section through Fault. 
Scale, 40 feet to 1 inch. 
Fig. 35.—Section through Fault. Scale, 40 feet to 1 inch. 
In age this fault would probably correspond with those occurring in the 
Berry lead at Spring Hills and elsewhere, near Allendale, which indicate 
that fractures of the earth’s crust have taken place in comparatively recent 
times, and even occur down to the present time. 
[ 8 . 1 . 12 .] 
ALLUVIAL AND REEF GOLD, BUFFALO RIVER, PARISH 
OF EURANDELONG. 
By E. J. Dunn , F.G.S., late Director , Geological Survey. 
On Black Creek, about half a mile above where it runs into the Buffalo 
River, there are some old alluvial workings where the creek cuts through a 
deposit of river gravel of Tertiary age, probably Newer Pliocene. The 
terrace that has been cut through is about 60 feet high on the river face, 
and a tunnel has been driven eastward for 300 feet under Mr. S. Paul’s 
