The Granite Industry of Southwestern New Brunswick: A Historical ...
The Granite Industry of Southwestern New Brunswick: A Historical ...
The Granite Industry of Southwestern New Brunswick: A Historical ...
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32 <strong>The</strong> <strong>Granite</strong> <strong>Industry</strong> <strong>of</strong> <strong>Southwestern</strong> <strong>New</strong> <strong>Brunswick</strong>: A <strong>Historical</strong> Perspective<br />
and the rift strikes N34ºE and dips 80ºSE. Nearby Quarry 18, an<br />
abandoned quarry on a southerly slope, has a face about 18 feet<br />
high. <strong>The</strong> sheeting dips 10ºN to 35ºN. <strong>The</strong> rift strikes N68ºW and<br />
stands vertical. <strong>The</strong> stone is a good medium red colour. <strong>The</strong> quarry<br />
was worked for a long time and yielded much good stone <strong>of</strong> large<br />
dimension. Operations ceased about thirty years ago.<br />
Quarry 19 (‘Big Dump Quarry’) is located on the east side <strong>of</strong><br />
the Canal Road on a steep, westerly slope facing the Magaguadavic<br />
River. <strong>The</strong> main opening is 100 feet long and 60 feet wide, and the<br />
eastern face is about 40 feet high. It is a hole with drainage through<br />
a rock trench out <strong>of</strong> the southwestern side. Stone has not been<br />
quarried from this site for more than twenty years. <strong>The</strong> sheeting is<br />
nearly horizontal. A prominent joint set strikes N12ºW and stands<br />
nearly vertical parallel to the rift. A second set strikes N70ºW and<br />
dips 60ºN, and a third strikes N60ºE and stands about vertical. It<br />
is said that large quantities <strong>of</strong> large, dark red dimension stone came<br />
from this quarry in spite <strong>of</strong> the impression one gets that the large<br />
pile <strong>of</strong> waste rock would more than fill the quarry. <strong>The</strong> derrick was<br />
operated by horsepower.<br />
Quarry 20 lies farther to the northwest along the Canal Road<br />
and has not been worked for many years. It is located on a steep<br />
westerly slope, and stone has been removed for a distance <strong>of</strong> over<br />
100 feet. <strong>The</strong> eastern end is excavated into the sidehill with a face<br />
about 20 feet high. Prominent jointing strikes N80ºE and dips<br />
70ºS to 80ºS; another more irregular set strikes N27ºW and dips<br />
70ºSW. <strong>The</strong> stone is a rather peculiar colour for St. George granite.<br />
It looks as though the orthoclase was formerly ivory coloured and<br />
afterward partially changed to a reddish brown, giving a slight<br />
yellowish brown tint to the whole rock. <strong>The</strong>re are also narrow,<br />
vein-like lines <strong>of</strong> rock that contain more quartz than the normal<br />
rock with abnormally light-coloured granite on the walls, grading<br />
outward through a narrow irregular zone with pinkish orthoclase<br />
and finally into the yellowish brown stone characteristic <strong>of</strong> this<br />
quarry.<br />
Quarry 31 is located west <strong>of</strong> the Magaguadavic River on a<br />
narrow strip <strong>of</strong> land that lies between Young’s property on the<br />
north and the old Tayte Meating property on the south (Map 3).<br />
<strong>The</strong> opening is about 140 feet long and the stone is medium red.<br />
This quarry is one <strong>of</strong> the first to be operated by Milne, Coutts &<br />
Co. Although much good stone is still available, it was abandoned<br />
many years ago and is now overgrown with trees.<br />
Analysis<br />
Parks (1914, p. 114) reports the following physical<br />
characteristics for the salmon-coloured granite from Quarry 12.<br />
Characteristic Value Unit<br />
Specific gravity 2.621 n/a<br />
Weight per cubic foot 162.444 lb<br />
Pore space 0.719 per cent<br />
Ratio <strong>of</strong> absorption 0.298 per cent<br />
Coefficient <strong>of</strong> saturation: one hour 0.58 n/a<br />
Coefficient <strong>of</strong> saturation: two hours 0.59 n/a<br />
Crushing strength 31,863 lb / sq in<br />
Crushing strength (wet) 29,450 lb / sq in<br />
Crushing strength (wet after freezing) 24,974 lb / sq in<br />
Loss on treatment with carbonic acid & oxygen 0.00087 gm / sq in<br />
Transverse strength 2,309 lb / sq in<br />
Drilling factor 3.9 mm