The Canadian Naturalist and Geologist, Volumen1Dawson., 1864 |
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Página 16
... present one , which will contain , in the first part , some theore- tical considerations which it is conceived should serve as a basis to lithological studies . In the second part will be given a few definitions which may serve to ...
... present one , which will contain , in the first part , some theore- tical considerations which it is conceived should serve as a basis to lithological studies . In the second part will be given a few definitions which may serve to ...
Página 18
... present , along with melted rock , and various gases and vapors . * * * * Itherefore think that we must conclude provisionally , that at a great depth from the surface , at the foci of volcanic activity , liquid water is present along ...
... present , along with melted rock , and various gases and vapors . * * * * Itherefore think that we must conclude provisionally , that at a great depth from the surface , at the foci of volcanic activity , liquid water is present along ...
Página 20
... present mineralogical characters dissimilar to those of the undisturbed crystalline sediments . With this exception , the only distinction which can be drawn between stratified and unstratified masses must in most cases be based upon ...
... present mineralogical characters dissimilar to those of the undisturbed crystalline sediments . With this exception , the only distinction which can be drawn between stratified and unstratified masses must in most cases be based upon ...
Página 21
... present day will probably be found to deny the plutonic origin of most non - stratified rocks , so that the once vexed questions of the neptunists and plutonists may be regarded as set- tled . If however we go back but a few years in ...
... present day will probably be found to deny the plutonic origin of most non - stratified rocks , so that the once vexed questions of the neptunists and plutonists may be regarded as set- tled . If however we go back but a few years in ...
Página 28
... presents such great difficulties that we must be content for the most part with trivial names which have from time to time ... present in these , by hornblende , by chlorite , or by talc , giving rise in the latter case to what is called ...
... presents such great difficulties that we must be content for the most part with trivial names which have from time to time ... present in these , by hornblende , by chlorite , or by talc , giving rise in the latter case to what is called ...
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Abbé Provancher abundant acid alumina American animals appear augite beds Bell Beloeil bipinnate boulders branches Canada Canadian Naturalist carbon character cinereal collection color common contains crop crystalline crystals Dawson deposited diorite dolerite dykes eggs feet feldspar fern fertile fish Flora formation fossils frond Gaspé geological geologists granite Gray hatch hornblende humus Inapp inches insects Island Lake land larvæ Laurentian Lennoxville Liebig lime limestone Linn Macoun manure mass Michaux Michx miles mineral Montreal mountain Natural History Society nearly nitric acid nitrogen observed orthoclase Ottawa P. W. Maclagan peat pinnæ pinnate pinnules plants portion potash present Prof Professor province Pursh pyroxene quartz Quebec remarkable river rocks salmon sandstone Shefford shores side silica Silurian soda soil species specimens strata stream superphosphate supply surface syenite tion trachytes variety vegetation William Sheppard woods Yamaska
Pasajes populares
Página 103 - ... The most easy and practical mode of effecting their division is to pour over the bones, in a state of fine powder, half of their weight of sulphuric acid diluted with three or four parts of water, and after they have been digested for some time, to add one hundred parts of water, and sprinkle this mixture over the field before the plough.
Página 17 - Erdkorpers, published in 1834, maintained that all crystalline non-stratified rocks, from granite to lava, are products of the transformation of sedimentary strata, in part very recent, and that there is no well-defined line to be drawn between Neptunian and volcanic rocks, since they pass into each other. Volcanic phenomena, according to him, have their origin not in an igneous fluid centre, nor...
Página 107 - Waterloo, and of the Crimea; already from the catacombs of Sicily she has carried away the skeletons of many successive generations. Annually she removes from the shores of other countries to her own the manurial equivalent of three million and a half of men, whom she takes from us the means of supporting, and squanders down her sewers to the sea.
Página 394 - This increase of bulk, he says, must sometimes give rise to a mechanical force of expansion capable of uplifting the incumbent crust of the earth ; and the same force may act laterally so as to compress, dislocate, and tilt the strata on each side of a mass in which the new chemical changes are developed. The calculations made by this eminent German chemist of the exact amount of...
Página 107 - England is robbing all other countries of the condition of their fertility. Already, in her eagerness for bones, she has turned up the battle-fields of Leipzig, of Waterloo, and of the Crimea; already from the catacombs of Sicily she has carried away the skeletons of many successive generations.
Página 392 - ... and streams of lava which the volcano pours out on the surface. To one who urges such an objection it may be said that the quantity of solid as well as gaseous matter transferred by springs from the interior of the earth to its surface is far more considerable than is commonly imagined. The thermal waters of Bath are far from being conspicuous among European hot springs for the quantity of mineral matter contained in them in proportion to the water which acts as a solvent ; yet...
Página 217 - To Lavoisier belongs the noble initiation of the work; to Davy, its splendid prosecution; to Liebig, its glorious consummation. Embracing in his masterly induction the results of all foregone and contemporary investigation, and supplying its large defects by his own incomparable rc-carches, Liebig has built up on imperishable foundations, as a connected whole, the code of simple general laws on which regenerated agriculture must henceforth for all time repose."— International Exhibition Report,...
Página 395 - Thermal springs, charged with carbonic acid and with hydrofluoric acid (which last is often present in small quantities), are powerful causes of decomposition and chemical reaction in rocks through which they percolate. If, therefore, large bodies of hot water permeate mountain-masses at great depths, they may, in the course of ages, superinduce in them a crystalline structure ; and, in some cases, strata in a lower position and of older date may be comparatively unaltered, retaining their fossil...
Página 395 - ... mountain-masses at great depths, they may, in the course of ages, superinduce in them a crystalline structure ; and, in some cases, strata in a lower position and of older date may be comparatively unaltered, retaining their fossil remains undefaced, while newer rocks are rendered metamorphic. This may happen where the waters, after passing upwards for thousands of feet, meet with some obstruction, as in the case of the Wheal-Clifford spring, causing the same to be laterally diverted so as to...
Página 228 - Nor would I exclude altogether the action of glaciers in eastern America, though I must dissent from any view which would assign to them the principal agency in our glacial phenomena. Under a condition of the continent in which only its higher peaks were above the water, the air would be so moist, and the temperature so low, that permanent ice may have clung about mountains in the temperate latitudes. The striation itself shows that there must have been extensive glaciers, as now, in the extreme...