Principles of Geology: Being an Inquiry how Far the Former Changes of the Earth's Surface are Referable to Causes Now in Operation, Band 4John Murray, 1835 - 1782 Seiten |
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alluvium Alps alternate ancient appear aqueous argillaceous Auvergne basalt beds belong Blaye brown coal calcaire grossier calcareous Cantal chalk clay cliff composed cones conglomerate consist containing crag crater crystalline denudation deposits dikes district Eifel elevation England Eocene Eocene period Eocene strata eruptions escarpment faluns flints formed fossil fresh-water formation Geol geological geologists gneiss granite gravel green-sand greywacké groups gypsum height hills horizontal hundred feet hypogene igneous inclined lacustrine lakes land lava layers limestone loam London clay marine marl mass miles mineral Miocene mountains observed occur Older Pliocene Olot oolite organic remains origin Paris basin pebbles Pliocene plutonic Pyrenees quadrupeds quartz red sandstone resembling ridge river sand schist scoriæ secondary rocks secondary strata sedimentary seen shale shells siliceous sometimes species strata stratified Subapennine supposed surface tertiary strata testacea thickness trachytic tuff upper valley Velay vertical volcanic rocks Weald Wealden
Beliebte Passagen
Seite 368 - I think, the only satisfactory solution of this problem. According to that theory, the materials of gneiss were originally deposited from water in the usual form of aqueous strata ; but these strata were subsequently altered by subterranean heat so as to assume a new texture.
Seite 217 - For my own part, I have always considered the flood, when its universality, in the strictest sense of the term, is insisted upon, as a preternatural event, far beyond the reach of philosophical inquiry, whether as to the causes employed to produce it, or the effects likely to result from it.
Seite 399 - ... as to indicate throughout a perfect harmony of design and unity of purpose. To assume that the evidence of the beginning or end of so vast a scheme lies within the reach of our philosophical inquiries, or even of our speculations, appears to us inconsistent with a just estimate of the relations which subsist between the finite powers of man and the attributes of an Infinite and Eternal Being.
Seite 399 - ... and habits of prior races of beings. The disposition of the seas, continents, and islands, and the climates, have varied ; the species likewise have been changed ; and yet they have all been so modelled, on types analogous to those of existing plants and...
Seite 362 - And again, through all this region, whatever be the contortions of the rocks the planes of cleavage pass on, generally without deviation, running in parallel lines from one end to the other, and inclining at a great angle to a point only a few degrees west of magnetic north.
Seite 230 - From the occurrence of these tertiary outliers Dr. Buckland inferred, " that the basins of London and Hants were originally united together in one continuous deposit across the now intervening chalk of Salisbury Plain in Wilts, and the plains of Andover and Basingstoke in Hants...
Seite 211 - Clermont,) could hardly have failed to notice them. Had there been even any record of their existence in the time of Pliny or Sidonius Apollinaris, the one would scarcely have omitted to make mention of it in his Natural History, nor the other to introduce some allusion to it among his descriptions of this his native province.
Seite 346 - The granite at this locality," says Mr. Lyell, " often sends forth so many veins as to reticulate the limestone and schist, the veins diminishing towards their termination to the thickness of a leaf of paper, or a thread. In some places fragments of granite appear entangled, as it were, in the limestone, and are not visibly connected with any larger mass; while sometimes, on the other hand, a lump of the limestone is found in the midst of the granite;" a, granite, b, limestone, c, argillaceous schist.
Seite 215 - Fleming f, that in the narrative of Moses there are no terms employed that indicate the impetuous rushing of the waters, either as they rose or when they re* Buckland, Reliquito Diluviunn?. treated, upon the restraining of the rain and the passing of a wind over the earth.
Seite 146 - Auvergne, or those which are found on Etna. Upon this rests another alluvium, c, which also contains the bones of Miocene species, and this is covered by another enormous mass of tufaceous breccia. The breccias have probably resulted from the sudden rush of large bodies of water down the sides of an elevated volcano at its moments of eruption, perhaps when snow was melted by lava. Such floods occur in Iceland, sweeping away loose blocks of lava and ejections surrounding the crater, and then strewing...