CHAPTER III. MARBLES OF THE AMERICAN CONTINENT. Canada. The crystalline limestones of the Lauren- tian series of rocks yield white marbles suited for decorative purposes, but not for statuary ; they are quarried at Calumet Falls on the Ottawa, Portage du Fort, and Fitzroy Harbour. Large blocks of pure white are obtained from Elzivir and Marmora ; and the statuary marble from Barrie would probably not be inferior to that of Carrara, were it not for grains and specks of quartz and tremolite, which detract from its excellence in quality. 1 Coloured marbles are obtained from the rocks at the mouth of the Madawaska, in Mac Nab county, on the Ottawa; the colours are grey, and dark grey variegated ; it can be raised in large blocks. A rich red variety is also found amongst the Quebec series of strata at St. Joseph on the Chaudiere. 2 Nova Scotia, &c. Marble occurs sparingly in the eastern states of British America; but coloured varieties are found amongst the Carboniferous lime stone strata at Fraser’s Mountain and Little Harbour 1 Logan, Geol. of Canada, p. 823. 2 Ibid. L