Elementary GeologyIvison & Phinney, 1862 - 430 Seiten |
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Agassiz agency alluvial Alluvium America animals and plants Annelids azoic azoic rocks beds beneath birds bones bowlders called Carboniferous chalk changes characters classes clay coal coast conglomerate contain Cretaceous crust Crustaceans crystalline deposits described Devonian drift earth elevation England Eocene example existing extinct fact feet thick feldspar fishes fissures foliation footmarks Foraminifera formation fossil fossiliferous genera geologists geology glaciers globe gneiss granite Greensand heat Hence hornblende Ichnology igneous inches islands Lake lava layers limestone Lower Silurian marl mass Massachusetts mastodon melted Mesozoic metamorphism mica schist miles mineral Miocene molluscs mountains nearly North occur ocean Oolite organic remains Owen Paleozoic pebbles period Permian petrifaction present probably produced Prof Professor quartz Red Sandstone reptiles river sand schist shales shells shows slate sometimes strata stratified rocks striæ suppose surface temperature terraces tertiary tion tracks Trias Triassic unstratified Upper Silurian valley veins volcanoes
Beliebte Passagen
Seite 307 - Milton's fiend, qualified for all services and all elements, the creature was a fit companion for the kindred reptiles that swarmed in the seas, or crawled on the shores of a turbulent planet. " The fiend, O'er bog, or steep, through strait, rough, dense, or rare, With head, hands, wings, or feet, pursues his way, And swims, or sinks, or wades, or creeps, or flies.
Seite 418 - ... surrounding world ; leaving standing, all over it, thousands of abrupt, irregular, prismatic, and columnar masses, frequently capped with irregular pyramids, and stretching up to a height of from one to two hundred feet, or more.
Seite 103 - A GLACIER is AN IMPERFECT FLUID, OR A VISCOUS BODY. WHICH IS URGED DOWN SLOPES OF A CERTAIN INCLINATION BY THE MUTUAL PRESSURE OF ITS PARTS.
Seite 367 - ... that with extinct as with existing mammalia, particular forms were assigned to particular provinces, and that the same forms were restricted to the same provinces at a former geological period as they are at the present day.
Seite 363 - We know, further, — so far at least as we have yet succeeded in deciphering the record, — that the several dynasties were introduced, not in their lower, but in their higher forms ; — that, in short, in the imposing programme of creation it was arranged, as a general rule, that in each of the great divisions of the procession the magnates should walk first.
Seite 241 - From these facts it is inferred, that for the most part, the imbedded animals and plants lived and died on or near the spot where they are found ; while it was only now and then, that there was current enough to drift them any considerable distance, or break them into fragments. As they died, they sunk to the bottom of the waters and became enveloped in mud, and then the processes of consolidation and petrifaction went slowly on, until completed.
Seite 174 - The atmosphere in all directions was filled with ashes, spray, and gases; while the burning lava, as it fell into the water, was shivered into millions of minute particles, and being thrown back into the air, fell in showers of sand on all the surrounding country. The coast was extended into the sea for a quarter of a mile, and a pretty sand-beach and a new cape were formed. Three hills of scoria...
Seite 88 - Watt melted 700 pounds of basalt, and caused it to cool slowly, when globular masses were formed, which enlarged and pressed against one another until regular columns were the result.
Seite 172 - ... more extraordinary, the most remarkable on record, was an eruption in Sumbawa, one of the Molucca islands, in 1815. It began on the fifth day of April, and did not cease till July. The explosions were heard in one direction nine hundred and seventy miles, and in another seven hundred and twenty miles.
Seite 143 - Drift striae as frequently ascend mountains hundreds of feet. 4. Drift is spread promiscuously over the surface, and the blocks are a good deal rounded. The detritus of glaciers more or less blocks up the valleys, and the fragments are frequently quite angular. These, however, are in part covered with other materials, which have descended from the mountains.