4 PLUTONIC ROCKS,—CASE I. 
PLUTONIC ROCKS. 
Case I. 
GRANITIC ROCKS. 
-*], COARSE-GRAINED, TERNARY 
GRANITE. Map No. Ra 38. 
Wear the top of Mount Tarran- 
gower. }sheet 14 S.W. 
Occurs in the Silurian rocks; in 
places it has the appearance of graphic 
granite, 
2. BINARY GRANITE. 
Map No. Mb 43. 
Hughes’s Tunnel (No. 3), Coliban 
Water Supply Contract, Mount 
Alexander, } sheet 13 N.W. 
The embedded crystals of felspar 
(orthoclase) are here seen distinctly. 
It also contains nests of tale. 
2a. BINARY RANITE. - 
Map No. Rd 26. 
Staughton’s Run, near Anakie 
Hills, 3 sheet 19 N.E. 
2B. ŪRYSTAL or FELSPAR. 
List No. Rd 27. 
Section 24, parish of Lara, near 
Duck Ponds Creek. 4 sheet 
19 N.E. 
Fine-grained granite, with a large 
amount of mica. 
*3. FELspAR Cnrystat (Ortho- 
clase). Map No. Mb 42. 
Same locality as No. 2. 
These crystals occur in a series of 
small dykes, running across the open 
cutting, 60 feet from south endof tunnel. 
*4. BINARY GRANITE. 
Map No. Ra 45. 
Section 10, parish of Bradford. 
4 sheet 14 N.W. 
Forms a dyke in granite. Large twin 
crystals of orthoclase. 
Those marked with an 
5. TOURMALINE Crysrats, 
Map No. Mb 33. 
East foot of Mount Alexander, 
eae highest point, + Sheet 13 
Occurs in lon 
g radiating, prismatic 
crystals, f 
6. DECOMPOSED GRANITE (Kao- 
lin or-China Clay). 
Map No. R 2. 
Deep Creek, township of Bulla. 
t sheet 7 S.E. 
. A compan 
y was formed in 1861 to 
work this d 
eposit for exportation ; but 
as the valuc of the best kaolin is only 
18s. per ton, the enterprise was not suc- 
cessful, and had to be abandoned. It 
occurs in large quantity, and will doubt- 
less be valuable when a local china 
manufacture is established. 
*7. STEATITE (Variety of). 
Map No. Mb 39. 
Same locality as Nos. 2 and 3. 
Hydrated silicate 
alumina. Tt occurs 
ternary granite, 
of tunnel. 
of magnesia and 
as a vein in a red 
396 feet from north end 
*8. Hyprovus SILICATE or ALU- 
MINA AND Macnesra. 
Same locality as last, 
Occurs as a vein 429 fi 
a eet from north 
end of tunnel, Tt is colored g 
el, ed gre Fs 
bably by oxide of iron, A Di 
9. COARSE, TERNARY GRANITE. 
List No. R (SR 
Pyramid Hill, (x) 
* occur as dykes (Elyans), 
