TERTIARY OR CAINOZOIC AND RECENT ROCKS.—CASE XI. 
20. QuARTZ PEBBLES. 
Leigh River, near Steiglitz. 
From a 31-feet shaft in the Miocene 
grayels. 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 
copper probably result from the decom- 
position of the ferruginous manganese 
ores, coating the rocks in the neighbor- 
hood.” 
21, LIMESTONE. 
Shores of Lake Tyers, Gippsland 
Containing remains of polyzoa. 

22. WHITE, SOFT Limestone. 
Benallic, Moorabool River. 
Porous stone, made up of fragments 
of marine shells, &c., cemented together 
by carbonate of lime. It is easily 
decomposed. The color yaries with the 
amount of iron, but it is generally pale- 
yellow. An analysis by Mr. J. C. 
Newbery gave— 
Carbonate of lime ... 95°64 
magnesia 2°48 
iron... traces 
Clay, &c. Sr, A TERY! 
” 

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, 
perhaps still somewh 
of the specimens of the subdivisio 
1. WuitE OLAY. Map No. R53. 
Section 8, Newham, } sheet 5 
S.W. 
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 a0 ip ed 4) 
Hard, coarse breccia Shey 
Soft, white breccia O p: 
Breccia, containing frag- 
ments of other rocks ... 4 5, 
Very coarse breccia ee th ay 
Alternating coarse and 
fine breccia, with thin 
seams of ferruginous 
sy WO yp 
breccia If 

Total s 56 feet 

Not bottomed, 

the precise geological date of the earliest of these drifts is 
at uncertain; as is also the classification of some 
ns of the Upper Tertiary rocks. 
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 
rits. 
This fresh-water limestone contains 
fossil shells (Truncatella), Its analysis 
_ by Mr, J. C. Newbery gave— 
Silica, clay, &c. see 4467 
Carbonate of lime .., 54°974 
Carbonate of magnesia 39:007 
Sesqui-oxide of iron... 1°476 

, 99:924 

3. 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. 
r Soft and earthy, associated with Ter- 
tiary, quartzose grit, underlying newer 
basalt. ES 
