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filled with pink or white calcite. Individual veins may 
lack the apatite, or the calcite, but more often the two 
occur together in the centre, perfectly formed apatite 
crystals being embedded in the _ calcite. Sometimes 
perfect crystals of phlogopite are also found embedded 
in the calcite. The calcite gives a strong strontium 
flame reaction. Quartz, fluorite, tourmaline and actin- 
olite are of less frequent occurrence. 
Some of the veins follow lines of faulting. Sometimes 
also they are displaced laterally for a few feet, but whether 
this is due to subsequent faulting or to an original dis- 
continuity of the fractures cannot be determined under 
present conditions. Changes in thickness of the veins 
are more common in the gabbro than in the other types 
of country rock. Bulging and narrowing of the vein 
is especially well seen along the main lead. The same 
variation is shown in depth, a vein which may be only 
one foot (-3 m.) in width at the surface widening to Io 
to 15 feet (3 to 4-5 m.) underground. An _ example 
of this can be seen at the south face of the hill. This 
characteristic is recognized in prospecting, and further 
work on apparently lean veins at the surface has been 
rewarded frequently by the discovery underground of 
wider veins carrying important bodies of mica. At present 
the veins are being worked for mica, the apatite being 
taken out and stocked on dumps. 
The south hill is occupied by a mass of binary granite 
intruded by a dyke-like mass of scapolite gabbro similiar 
to that occurring at the north hill. The veins are found 
more especially along the eastern face of the hill near the 
gabbro dyke, and strike parallel to those of the north hill. 
The veins are exactly similiar to those seen on the north 
hill, except that calcite is almost lacking, and the apatite 
is usually of a reddish colour rarely seen on the north hill. 
ANNOTATED GUIDE (continued.) 
Returning to Kirk Ferry, granite-gneiss and intrusive 
pegmatites are seen west of Langside farm, and, at the rise 
in the road, a mica vein is exposed. Opposite Wilson’s 
farm the gneiss is cut by an aplite dyke, composed of 
plagioclase and quartz, with a little magnetite. 
At the bend of the road just beyond, a white Pre- 
Cambrian quartzite is exposed on the west side of the 
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