..Report on the building and ornamental stones of Canada, volI-V . a thickness of 40 feet, which representsthe upper portion of the formation and the transition beds to the Calciferousdolomites. In this, the lower 33 feet consists of interstratified beds of sand-stone, sometimes calcareous but occasionally hard and vitreous with Sc-ilithusmarkings. The upper 7 feet consist of reddish grey magnesian limestoneof the type common to the Calciferous over large areas. Ells also states:Further west on the north side of the Ottawa, between Papineauville andMontebello, a quarry is located in the Potsda
..Report on the building and ornamental stones of Canada, volI-V . a thickness of 40 feet, which representsthe upper portion of the formation and the transition beds to the Calciferousdolomites. In this, the lower 33 feet consists of interstratified beds of sand-stone, sometimes calcareous but occasionally hard and vitreous with Sc-ilithusmarkings. The upper 7 feet consist of reddish grey magnesian limestoneof the type common to the Calciferous over large areas. Ells also states:Further west on the north side of the Ottawa, between Papineauville andMontebello, a quarry is located in the Potsdam sandstone which has yieldeda large amount of stone. It is reasonable to expect that the area in Alfredshould be similarly productive. 138 Summary—Potsdam-Beekmantown Sandstone. The stone is mostly hard, white and flinty with brown spots and checks;the workable varieties are the exception to the above rule. Four or five typesof stone may be recognized as follows:— 1st. A coarse grained red, white, and salmon-coloured banded type,({uarried at Kingston Fig. 9. Sketch map of part of Eastern Ontario, showing the areas of Potsdam-Eeekmantown Sandstone and the cliief quarries. 2iid. A purple-banded type, procured near Perth. 3rd. A greenish red and white mottled stone now being ((uarried nearWestport. 4th. The Xepean stone in hard white, soft white and yelhjw and brownbanded varieties. 5th. White stone, sufficiently soft to work, is obtained at Lyn, Perth,etc. This stone varies in hardness and is often marred by brown spots. 139 On the whole the Potr-dam-Beekmantown sandstones are hard and arenot adapted to fine work. The three first mentioned types are the softestand most amenable to chiselling. Much of the stone makes excellent rubbleand random coursing and for rock face work it is very desirable. Literature:—Geol. Sur. Can., Rep. 1863, p. 91; p. 112. 1899, p. 81J; p. 130 J. MEDINA SANDSTONE. The sandstone l:»and of the Medina formation has an average thicknessof ab
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbuildin, bookyear1912
