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alluvial Alps amygdaloidal appears basalt Bohemia chemical clay clay-slate coal formation colour composed considerable considered contains crust crystals denominated distinct concretions earth Electorate of Saxony fame feet felspar fingle flœtz flœtz rocks Flœtz-Gypsum flœtz-limestone formed fossils frequently fundamental rock garnet geognostic globe gneiss granite granular greenstone grey Grey-wacke Slate gypsum Hartz height hence high land hills hornblende iron-pyrites ironstone island of Arran kind of structure lead-glance limestone low land lower Lusatia magnitude mantle-shaped masses mation mechanical depositions metalliferous mica mica-slate mineral mineralogists moun mountain group mountain-rocks newer formations newest flœtz-trap formation observed older oldest outgoings particularly petrifactions pitchstone Porphyry Porphyry Formation porphyry-slate portion primitive limestone primitive rocks principal pyrites quantity quartz sand Saxony schorl Scotland seams seldom Serpentine shews Sienite Silesia slat slaty structure stone strata stratified summits surface tains Thuringia tion transition rocks traverse unconformable usually valleys variety veins volcanoes wacke Werner whole
Page 346 - There is but one place from whence thefe minerals may have come ; this is the bowels of the earth ; the place of power and expanfion ; the place from whence has proceeded...
Page 80 - Although we cannot give a very satisfactory answer to this question, it is evident that the theory of diminution of water remains equally probable. We may be fully convinced of its truth, and are so, although we may not be able to explain it. To know from observation that a great phenomenon took place, is a very different thing from ascertaining how it happened.
Page v - Companion of the Most Honourable Order of the Bath, Member of the Supreme Council of India. The Honourable John Peter Grant, Member of the Supreme Council of India. The Honourable Barnes Peacock, Member of the Supreme Council of India. Charles Allen, Member of the Legislative Council of India.
Page 40 - ... re-assertion of the principal Wernerian notions. We should form a very false conception of the Wernerian Geognosy, were we to believe it to have any resemblance to those monstrosities known under the name of Theories of the Earth. . . . Armed with all the facts and inferences contained in these visionary fabrics, what account would we be able to give of the mineralogy of a country, if required of us, or of the general relations of the great masses of which the globe is composed? (Jameson, 1808,...
Page 65 - Chap. IV. General account of the different formations, in regard to their succession and stratification, and this illustrated by a short description of the Hartz and Saxon Erzgebirge. Chap. V, Theory of the diminution of the waters of the globe — Description of overlying formations.
Page iii - THIS volume of the System of Mineralogy is to be viewed as a Sketch of the Science of Geognosy, in its present state. It contains a statement of the best ascertained facts respecting the aspect of the Surface, and the Structure of the Crust of the Earth, and a few inferences, which appear to be legitimate, with regard to their mode of formation. It is intended also as the Text Book for my Lectures on Geognosy.
Page 150 - ... Wanlockhead ; in his Manual of Mineralogy, 1821, he says, " Greywackes and transition clay-slate abound in all the mountain ranges south of the Frith of Forth, are also frequent to the north of the same boundary, and are widely distributed in England"] of the Frith of Forth, are principally composed of this rock, and many, if not the whole, of the mountains in Cumberland, appear to be of the same nature.
Page 347 - ... fide. Thefe fucceffive coats, it is material to remark, are not in planes/ but in uneven furfaces, of which the inequalities are evidently determined by thofe of the walls, that is, of the rock which forms the fides of the vein : neither are they horizontal, but are parallel to the walls, whether thefe be perpendicular or inclined. Here, therefore, there is no appearance of the action of that ftatical law, which has directed the arrangement of the other ftrata, and which tends to make the plane...
Page 71 - Chap. V, Theory of the diminution of the waters of the globe — Description of overlying formations. — An investigation of the original contents of the waters of the globe, during the different periods of the earth's formation — The division of rocks into five classes.