10 PLUTONIC ROCKS.—CASE II. 
*89, Ternary GRANITE. 
Map No. Rb 27. 
The Gap, Mount Alexander. 
ł sheet 13 N.W. 
Similar to last. 
*90. Binary GRANITE. 
Map No. Rb. 41. 
Hughes's Contract, Coliban Water 
Supply, Wellington Flat, Sutton 
Grange. 3 sheet 13 N.W. 
Occurs running across open cutting 
as a small dyke in'a N.W. direction, 60 
feet from south end of tunnel (No. 3) ; 
white, with scarcely any mica. 
*91. EURITE. Map No. Ra 53. 
South end of Nuggetty Reef. 
ł sheet 14 N.W. 
A granular mixture of quartz and 
felspar. 4 
*92. TERNARY GRANITE. 
e Map No. Ra 51. 
Near N.W. corner of Municipal 
boundary, Maldon. 34 sheet 14 
N.W. 
Hard, fine-grained, nearly binary 
granite. 
*93. GRANITE. 
. . List No. Rb (20B). 
Hanging Rock, Heathcote, 
Brownish-grey rock, with the mica 
apparently decomposed. 
*94, GRANITE, 
List No. Rb (19B). 
Cemetery, Heathcote. 
Very fine granular base, with white 
mica, 
*95. GRANITE. 
List No. Rb (18B). 
Hanging Rock, Heathcote. 
Of a slightly yellow color, due to the 
partial decomposition of the felspar, 
*96, GRANITE. 
s _ List Rb (20B). 
Cutting of Kyneton Road, Heath- 
cote. ~- 
Ofa light-green color, 
*97. GRANITE. a 
List No. Rb (20B). 
Same locality as last, 
` 
Note.— Specimens Nos. 93 to 97 are from a dyke to the westward 
of the Heathcote township. In places this dyke is of an ordinary granitic 
character, in others it passes into an eurite. The various colors are well 
represented by the specimens, the most permanent being of a light- 
brown, occasionally passing into light-green. In width it varies from? 
2 to 5 chains, and is traceable for 4 miles south of the Kyneton Road 
cutting, where it appears to pass into a thin granitic dyke, accompanied 
by greenstone. It is extensively used in Heathcote, both for buildine 
and kerbing, the harder varieties being well adapted for these purposes. 
It has also been used for making filters or “ drip-stones.” This dyke 
has probably some connection with one occurring in 4 sheet 51 S.W. 
*98, EURITE. Map No. Ras, | *100. EURITE, GRANITITE. 
Pigeon Hill, Maldon. 4 sheet 14 Mount Alexander. +sheet13 N.W, 
SIW 
Occurs in granite ; a hard, granular, 
silico-felspathic base, with scattered, 
rounded quartz crystals. 
*99, EURITE. Map No. Rb 34. 
Similar to the last; but, on account 
of the appearance of mica in places 
the rock would come under the desig- 
nation of “ granitite.”’ 
*101. TERNARY GRANITE, 
Map No. Rb 24, 
Top of hill in section 5, Harcourt. 
4 sheet 13 N.W. ~ 
This rock consists of a microcrystal- 
line mixture, in nearly equal propor- 
tions, of flesh-colored orthoclase, a white 
striated felspar (most probably oligo- 
clase) and quartz. (See Table of 
Analyses, page 94.) 
O’Keefe’s Shaft (No. 3), Cotiban 
Water Supply, Piat Vale 
4 sheet 13 N.W. F 
Very hard, fine-grained, grey felstone 
with quartz veins, occurring 50 feet fron, 
surface, and coated with an infiltration 
of carbonate of lime. 
Those marked with an * occur as dykes (Elvans), 
