TERTIARY OR CAINOZOIC AND RECENT ROCKS,——CASE XI. 55 
for mortars and cements ; brick earths and clays for bricks, tiles and 
pottery of all kinds; also freestone and other stones suitable for building. 
Rich oxides of iron are also common, but not in beds sufficiently exten- 
sive, to be economically available. Examples of nearly all these will be 
found amongst the specimens :— 
MIOCENE. 
These rocks are well represented from the mouth of Spring Creek 
to the Bird Rock, 14 miles south of Geelong, where a thickness of 273 
feet of Miocene strata are exposed in fine cliff sections. The sequence 
of beds is as follows :— 
Upper Miocene. 
80 feet. Hard, thin-bedded, sandy limestone (the calcareous portion consisting 
almost entirely of fossils), the probable equivalent of the Mount 
Gambier series, described by the Rey. Julian Woods, 
Middle Miocene. 
80 feet. Soft, brown, sandy clay. * if 
Brown, blue and yellow, sandy clays, containing abundance of gypsum. 
30 y 
1 foot. Very hard, crystalline sandstone. 
12 feet. Brown, sandy clay, poor in gypsum. 
1 foot. Very hard, crystalline sandstone. 
5 feet. Brown sandstone, containing abundance of gypsum. 
10 5 
8 » 
Blue marl, containing septaria, gypsum and iron pyrites. 
Friable, thin sandstone, with thin bands of gypsum. 
Lower Miocene. 
1 foot. Very hard band of crystalline sandstone. 
17 feet. Soft, brown sandstone, with thin bands of harder material. 
20 Ries 
8 ,, 
1. SANDSTONE GRIT. List No. are 
Section 14g, Darriwell, 4 sheet 
19 S.W. 
Light-brown, arenaceous sandstone, 
the grains apparently merely cemented 
by pressure. 
2. SANDSTONE. _ List No. _W 
Same locality as No. 1. 

Brown sandstone, ' similar to the 
above. 
; wW 
83. QUARTZITE. List No. arg 
Same locality as the last. 
Red-and-yellow quartzite, the grains 
probably cemented by silica. 
4. QUARTZITE. List No. 55 
Same locality as No. 1. 
Mottled red-and-white, similar to the 
last. 
T™ 8. 

Thin-bedded, brown sandstone. 
Blue-and-grey, friable sandstone. 
+ 
5. SHELL LIMESTONE. List No. a : 
Maude, about 2 miles south along 
the east and west sides of the 
valley of the Moorabool River. 
4 sheet 19 S.W. 
This limestone occurs in irregular 
bands, about 2 feet thick, interstratified 
in the upper part of the older basalt. 
Tt takes a good polish, but is not in suf- 
ficient quantity for economic purposes. 
6. LIMESTONE. Map No. Aa 6. 
About a mile west of Keilor. 
3 sheet 1 N.W. 
Brown-and-yellow, argillaceous rock, 
containing fragments of corals, spines of 
echini and other Tertiary fossils. An 
analysis gave the following results :— 

Carbonate of lime 91 61 
A magnesia . 020 
5 iron 253 
Silica and clay .. .. 566 
10000 

It would make a good lime for building 
‘purposes. 
