... Report on the building and ornamental stones of Canada, vol. I-V (1912)
Parks, W. A. (William Arthur), 1868-1936, Canada. Mines Branch · Ottawa : Government printing bureau · leaf 260
ntsdipping vertically, strikes into the mountain at about X^. 30°\V. Towardsthe eastern end of the opening these joints are closely set and give rise to aheading of 50 feet or more in width; westward they are more widely spacedand do not interfere with the extraction of large blocks. At the top… … Black granite. Quarry of the Mount Johnson Quarry Co., Mount Johnson, Que. 177 The sheeting is irregular and different layers are shown in differentparts of the quarry. The upper sheet, now largely removed, is 12 feetthick, the second layer averages about 10 feet, while the lower sheets aremore…
Building stones
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