Report of Progress - Geological Survey of CanadaGeological Survey of Canada, 1866 Atlases accompany 1853-56, 1877/78, 1882-1884. Atlas accompanying 1853-56 has title: Plans of various lakes and rivers between Lake Huron and the river Ottawa, to accompany the geological reports ... Toronto, 1857. |
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acid alluvions amygdules anticlinal apatite appears assays auriferous band beds black shale brine calcareous calcite calespar carbonate of lime cent chloritic chloritic slate clay colour conglomerate consists contains copper Corniferous crystalline limestone crystals dark delessite deposits depth described diabase diorite disseminated dolomite Eozoon epidote feet feldspar formation fossils Geol Geology of Canada gneiss gold grains granite granular graphite gravel Green carbonate greenstone hematite hornblende Huronian imbedded inches interstratified iron pyrites island Lake latter layers limestone Lower Silurian Madoc magnesia magnetic magnetite Marmora masses matrix melaphyre mica micaceous miles minerals mines numerous observed occurs orthoclase overlying petroleum Portage portion pyroxene quartz quartz veins range region River salt sandstone scapolite serpentine shore silicates Silurian similar sometimes species specific gravity specimens strata strike sulphid sulphur sunk thickness township trap upper Variegated and vitreous Variegated sulphuret veinstones vitreous sulphurets Yellow sulphuret yield
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Halaman 3 - Governor General of British North America, and Captain General and Governor in Chief in and over Our Provinces of Canada, Nova Scotia, New Brunswick, and the Island of Prince Edward, and Vice Admiral of the same, &c., &c., &c.
Halaman 281 - Other things being equal, it may probably be said that the value of a stone for building purposes is inversely as its porosity or absorbing power.
Halaman 27 - ... belongs. These questions will be found discussed in detail in Dr. Hunt's Report, where the distinction between the graphite in the beds, and that in veins, is dwelt upon. The veins of this mineral hitherto found in the rocks of this country, although affording a very pure material, appear to be too limited and too irregular to be exclusively relied on for mining purposes, which should rather be directed to making available the large quantities of graphite, which, as we have seen, are disseminated...
Halaman 150 - ... of an inch in diameter. In the latter case they are irregularly shaped, with rounded angles, but they are never quite round or amygdaloidal. They frequently consist in the centre of dark green laminae. The mineral is very soft, and has a light greenish-grey streak.
Halaman 286 - After the layer of pulp has been exposed for a couple of days, or for a shorter time in hot weather, it becomes 'consolidated, and begins to show cracks. As soon as these appear, the pulp-bed is divided by transverse cuts, at intervals of six inches. The operation is performed by two men, one on each side of the bed, who, by means of a rope, pull a frame-work of wood carrying curved knives, six inches apart, across it. A little practice enables them to perform this work with great accuracy. A few...
Halaman 153 - The matrix is fusible to a black, slightly magnetic glass. It is in places impregnated with grains of metallic copper, from the minutest size to those having a diameter of a tenth of an inch. Those of a still larger size very generally project from the matrix into the amygdules, or form rounded particles lying entirely within these cavities, and filling them. The copper is here accompanied by a mineral of a light- green color, very soft, and separable from the rock as a green powder. It fuses before...
Halaman 185 - ... pyroxenites pass, by a gradual disappearance of the pyroxene. These peculiar strata, which contain at the same time the minerals of the associated gneiss, and of the limestones, may thus be looked upon as beds of passage between the two rocks. Their mineral species and varieties, so far as my observations go, are identical with those of the limestones themselves. It should be remembered, that besides the minerals already mentioned as predominating in these strata, other species characteristic...
Halaman 222 - ... Brodie, represented by that of Borrowdale and Passau, and the lamellar variety from Ceylon, and from the Laurentian veins of North America, may be placed the interstratified graphites of New Hampshire, and of Sturbridge, Massachusetts, which are more or less crystalline in texture. It will probably be found that the highly crystalline lamellar graphite belongs, in all cases, to true veins, where a slow process of deposit has allowed it to assume that mode of aggregation and that purity which...
Halaman 279 - These later analyses being directed chiefly to the determination of these changes, no attempt was made to determine potassium, iodine and bromine. For the purposes of comparison, the two series of analyses are here put in juxtaposition; the elements just mentioned being included with the chlorid of sodium, and the figures reduced to three places of decimals. The precipitate by a solution of gypsum from the concentrated and acidulated water was regarded as sulphate of strontia, and calculated as such,...
Halaman 223 - Its occurrence in cast-iron is well known ; and Brodie, who obtained, by dissolving a graphitic iron in acid, four per cent of lamellar graphite, found it to be identical in physical characters with that met with in nature. Jacquelain also, by the decomposition of sulphuret of carbon in contact with metallic copper, at 800° Centigrade, obtained, together with sulphuret of copper, amorphous graphite. Starting from this experiment, Jacquelain suggests that native graphite may have originated from...