60 NOVA SCOTIAN GEOLOGY—HONEYMAN. 
The granites of the region are generally coarse in structure. 
It is only on the ground of use and wont that they are entitled 
to the name. Their constituent minerals are, as usual, Ortho- 
clase, Muscovite and Quartz, the two first minerals generally 
prevail. They are not quartzose and consequently are not first- 
class building stones. They polish well however and easily, and 
are favorites with workers, (more so than the granites of Shel- 
burne, which are truly granites—quartzose granites). The ortho- 
clase is white, often very white, the mica is black and grey, the 
quartz is often hyaline and often smoky. In some places the 
mica of the granite is black, in others it is grey, sometimes both 
occur. The rocks are largely porphyritie with large crystals of 
orthoclase, especially the very white variety. Some years ago 
I found in one of the cuttings of the water works, granite with 
deep red orthoclase, this has a green foliated mineral in place of 
the mica. A Museum polished specimen of this rock is very 
beautiful. The polishing has removed the green mineral, so that 
the surface is singularly marked. It was thought that the stone 
would be adapted for ornamental purposes, its extent was found 
to be small. 
MINERALS, 
In some places the minerals of the granite are segregated, 
one of the constituents being found without the other, mica is thus 
found and also feldspar. | Here the mica may be said to consti- 
tute the rock, and there is no difficulty in securing specimens of 
any size. Around these the mixed rock is so coarsely constituted 
that it would pass for a gneiss in acknowledged Archean regions. 
In one place, under a bridge at Long Lake embankment, nothing 
but feldspar is seen of clayey colour. In this black tourmaline 
abounds in large crystals. A specimen which was brought to the 
Museum is very singular, it is composed of feldspar and quartz 
‘and mica, the feldspar and quartz are very marked, long and 
large tourmaline crystals pervade, passing indiscriminately 
through the quartz and feldspar indicating simultaneous crystal- 
lization of the three. Another large specimen from the same 
quarter is sub-conical in form, it is composed of feldspar and 
mica plates, the latter are arranged so as to give shape to the 
whole. In some places the quartz is snow-white, in this crystals 
