8 PLUTONIC ROCKS,—\CASES I. AND II. 
60. TERNARY GRANITE. 
Map No. Rb (7a). 
Fraser’s Contract for Coliban 
Water Supply, Preston Vale. 
4 sheet. 
Obtained 4} chains from north end of ` 
tunnel. It is exceedingly hard. The 
felspar is of a green color, and iron 
pyrites occur disseminated through the 
rock, 
61. TERNARY GRANITE. 
Map No, Rb 20. 
O’Keefe’s Contract for Coliban 
Water Supply, Preston Vale, 
4 sheet 13 N.W. f 
Very hard, with white and bluish- 
white felspar (orthoclase and oligoclase 
respectively). From Government shaft 
No. 2. (See Table of Analyses, page 94.) 
*62. TERNARY GRANITE. 
Map No. Ra 31. 
Brewery Springs, Maldon. 4 sheet 
14 N.W. 
From a dyke-like mass in the Silurian 
rocks. 
63. TERNARY GRANITE. 
; List No. Re 5. 
Ryrie’s Flat, Badger Creek, Upper 
Yarra. 

64. TERNARY GRANITE. 
! List No. R (8) 
Carter’s Rosebrook Station. 
Flesh-colored, 
65. Ternary GRANITE. 
Map No. Rb 26. 
O’Keefe’s Contract, Coliban Water 
Supply, Preston Vale, 3 sheet 
13 N.W. 
From Government shaft No. 3, 116 
yards from surface. The felspar is of a 
greenish-white tint, and has a peculiar 
pearly lustre. 
66. TERNARY GRANITE. 
Map No. Rb 19. 
O’Keefe’s Contract, Coliban Water 
Supply, Preston Vale. 4 sheet 
13 N.W. 
From bottom of Government shaft 
No. 1, 92 feet 7 inches from surface. It 
consists of grey quartz, black mica, and 
semi-decomposed yellow felspar. 
67. SyENITIC GRANITE, 
Gabo island, 
It consists of red felspar, quartz, and 
' hornblende. A good building stone, but 
expensive to work. Usedin the General 
Post Office, the Custom House, and 
the Australasian Insurance Company’s 
Offices. 
Case II. 
GRANITIC ROCKS AND PORPHYRIES. 

GRANITIC ROCKS—(continued), 
*68. Granite PorPHYRY. 
Map No, Ra 3. 
Near S.W. corner of lot 8, section 
` 2a, Tarrangower. shect4S.W. 
A grey felspathic base, with scattered 
quartz and felspar crystals, a little 
mica and iron pyrites; also rounded 
quartz grains, It weathers white. 
#69. TERNARY GRANITE. 
> Map No. Ra 13. 
Near lot 10, section 28, Maldon. 
4 sheet 14 S.W. 
Occurs in Silurian rocks. 
poses in patches. 
It decom- 
70. TERNARY GRANITE. 
List No. R (58) 
15 
Mansfield Road, Broken River, 
*71, TERNARY GRANITE, 
Map No. Ra 10. 
Se Baringhup. 4 sheet 
Traversing granite, and consisting of 
a coarse granular base of quartz and 
felspar, with dark felspar crystals. It 
passes into a coarse granite, , 
Those marked with an * occur as dykes (Elvans), 
