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II. GENERAL DESCRIPTION. 
ranite mass occupies an area of approximately 2 
les. 
In 
seen to cut across and intersect it. These intrusions bear a 
close relationship to the granite, and form a highly interestmg 
series. 
The main occurrences are listed below :— 
(i.) A large elliptical (in cross section) mass of grey 
__ 8plite is developed behind Barn Bluff. 
(".) A smaller mass occurs on the sea coast, south of 
.. Cannon Hill. This is a pink aplite. 
(1i.) Minor dykes of a white pegmatite occur at the 
northern side of Barn Bluff at the head of the first 
gully south of the lighthouse, and veins both north 
and south of Pink Bay. These latter veins have 
= the trend for the most part of the joint planes of 
the granite. i 
m : In the in mass of granite segregations are sporadical y 
mas distributed. TI are pire m nen and finer-textured 
E patches (cognate xenoliths). Some show a slightly darker 
: colour than the general colour of the normal granite. | 
' 
