Elements of Geology, Band 1Hilliard, Gray, 1841 |
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alluvium Alps ancient animals aqueous argillaceous Auvergne beds bones bottom boulders breccia calcareous called carbonate of lime chalk character clay cliffs coal coast composed consist containing corals crag Cretaceous crystalline denudation deposits depth distinct earth earth's crust Eocene extinct faluns fauna feet thick Fitton flint formations formed fossil shells fossiliferous fossils fragments freshwater genera genus Geol geologists Geology glaciers gneiss granite gravel green-sand groups gypsum height horizontal inhabiting islands Jura lakes land lava layers limestone living loess London clay lower manner marine shells marl mass miles mineral Miocene mountains newer observed occur ocean Oolite organic remains origin Paris basin pebbles period Pliocene plutonic portion position Post-Pliocene quadrupeds recent species regions rivers rocks sand sandstone sediment seen siliceous sometimes stone strata stratified stratum Suffolk surface tertiary strata testacea tion upper valley vertical volcanic Wealden white chalk zoophytes
Beliebte Passagen
Seite 395 - Kotzebue, stating that the inhabitants of the Radack archipelago, a group of lagoon-islands in the midst of the Pacific, obtained stones for sharpening their instruments by searching the roots of trees which are cast upon the beach.
Seite 188 - Poets that lasting marble seek Must carve in Latin or in Greek; We write in sand, our language grows, And, like the tide, our work o'erflows.
Seite 432 - If it be asked where the continent was placed from the ruins of which the Wealden strata were derived, and by the drainage of which a great river was fed, we are half tempted to speculate on the former existence of the Atlantis of Plato. The story of the submergence of an ancient continent, however fabulous in history, may be true as a geological event.
Seite 50 - The upper valve is almost invariably wanting, though occasionally found in a perfect state of preservation in the white chalk at some distance. In this case, we see clearly that the sea-urchin first lived from youth to age, then died and lost its spines, which were carried away. Then the young Crania adhered to the bared shell, grew and perished in its turn ; after which, the upper valve was separated from the lower, before the Echinus became enveloped in chalky mud.
Seite 114 - The strike, or line of bearing, is the prolongation or extension of the strata in a direction at right angles to the dip ; and hence it is sometimes called the direction of the strata. Thus, in the above instance of strata dipping to the north, their strike must necessarily be east and west. We have borrowed the word from the German geologists, streichen signifying to extend, to have a certain direction. Dip and strike may be aptly illustrated by a row of houses running east and west, the long ridge...
Seite 8 - By a fossil is meant any body, or the traces of the existence of any body, whether animal or vegetable, which has been buried in the earth by natural causes.
Seite 282 - I proposed to give short technical names to those four groups, or the periods to which they respectively belonged. I called the first or oldest of them, Eocene, the second, Miocene, the third, Older Pliocene, and the last or fourth, Newer Pliocene.
Seite 393 - London, might, after full examination, be mistaken for ancient chalk, but for the labels attached to them. About the same time Mr. C. Darwin observed similar facts in the coral islands of the Pacific; and came also to the opinion, that much of the soft white mud found at the bottom of the sea near coral reefs has passed through the bodies of worms, by which the stony masses of coral are everywhere bored ; and other portions through the intestines of...
Seite iii - For it is a philosophy which never rests, which has never attained, which is never perfect. Its law is progress. A point which yesterday was invisible is its goal to-day, and will be its starting-post to-morrow.