ae 
i 
TERTIARY OR CAINOZOIC AND RECENT ROCKS.—CASE XI. 57 
20. QUARTZ PEBBLES. 
Leigh River, near Steiglitz. 
From a 31-feet shaft in the Miocene 
gravels. The ferruginous coating, on 
analysis, gives 3 dwts. 6 grs. gold to the 
ton. The quartz contains no gold. 
Mr. Newbery states, “that the coat- 
ing of these pebbles contained iron, man- 
ganese and copper oxides, mixed with 
siliceous clay. ‘The manganese and 
22. WHITE, SOFT LIMESTONE. 
Benallic, Moorabool River. 
Porous stone, made up of fragments 
of marine shelis, &c., cemented together 
by carbonate of lime, It is easily 
decomposed. The color varies with the 
amount of iron, but it is generally pale- 
yellow. An analysis by Mr. J. OC. 
Newbery gaye— ` 
copper probably result from the decom- Carbonate of lime ... 95:64 
position of the ferruginous manganese a magnesia 2°48 
ores, coating the rocks in the neighbor- a iron... traces 
hood.” ! Clay, &e. ae. x WERE 

21. LIMESTONE. l 
Shores of Lake Tyers, Gippsland. 
Containing remains of polyzoa. 
99:36 
— 


OLDER PLIOCENE. 
So far as at present known, none of the productive gold drifts are 
older than the rocks classed as above ; but, as no marine fossil remains 
have been found, either associated with, or overlying any productive 
gold drifts, the precise geological date of the earliest of these drifts is 
perhaps still somewhat uncertain ; as is also the classification of some 
1. WHITE Cray. 
of the specimens of the subdivisions of the Upper Tertiary rocks. 
Map No. R 53. 
Section 8, Newham, ‘$ sheet 5 
RANG 
A silicate of alumina and magnesia, 
from a hole (see Note) sunk by the 
Geological Survey in Older Pliocene 
drift, cropping out under the newer 
basalt escarpment. 
Note.—Particulars of hole sunk :— 
Soft, white clay, with ver- 
tical, vegetable stems... 6 feet 
Harder, stone-coloredrock 8 ,, 
Soft, yellowish rock ... 6 ,, 
Breccia, containing frag- 
ments of other rocks ... 12 ,, 
Hard, greenish-yellow 

breccia ae co: OF oy 
Hard, coarse breccia Sans 
Soft, white breccia oe BPs, 
Breccia, containing frag- 
ments of other rocks ... 4 ,, 
Very coarse breccia te SD 
Alternating |coarse and 
fine breccia, with thin 
seams of ferruginous 
breccia ox TOW tt 
Total ... 56 feet 
Not bottomed, 

2. IMPURE LIMESTONE. 
Map No, R (M 1). 
Section 10, Will- Will-Rook, Moonee 
Ponds. 4 sheet 2 S.W. 
It probably contains much magnesia, 
and was formerly burnt for lime. 
Occurs underlying newer basalt, with 
Tertiary quartzites and ferruginous 
grits. ~ - 
This fresh-water limestone contains 
fossil shells (Truncatella). Its analysis 
by Mr. J. C. Newbery gave— 
Silica, clay, &c. ese 4467 
Carbonate of lime ... 54°974 
Carbonate of magnesia 39:007 
Sesqui-oxide of iron... 1:476 

99°924 

8. IMPURE LIMESTONE. 
Map No. Ra 18a. 
Small creek falling into the 
Saltwater River, near south 
boundary of parish of Doutta- 
Galla, 4 sheet 1 N.W. 
Soft and earthy, associated with Ter- 
tiary, quartzose grit, underlying newer 
basalt. 
