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An Elementary Geology: Designed Especially for the Interior States - Primary ...
Ebenezer Baldwin Andrews
Keine Leseprobe verfügbar - 2013
ancient Archaean Archaean rocks beds Black Shale bones bottom bowlders Burlington called carbon Carboniferous caves Cincinnati Cincinnati Group clay Clinton coal-field Coal-meas Coal-measures contain copper Corniferous County Cretaceous crinoids Dana deposits Devonian drift earth Eocene feet high feet thick fishes formation fossils Galena geological geologists glacier granite gravel Hamilton hills Huronian icebergs Illinois inches Indiana Interior Iowa iron Kentucky Keokuk Lake Superior land Laurentian layers lead Lepidodendron Lesquereux lime limestone Lower Silurian Magnesian limestone Marsh mass Mesozoic Michigan miles Minnesota Missouri Mollusks Mountains Niagara northern ocean Ohio River Oriskany Period Permian portion Potsdam Prof region represents reptiles sand sandstone seam of coal seen shells shown in Fig shows Sigillaria Silurian Silurian rocks sometimes south-western species stone strata streams surface terraces Tertiary trees Trenton Triassic trilobites Upper Silurian valley vegetable vertebrates Waverly West Virginia Wisconsin
Seite 36 - My heart is awed within me when I think Of the great miracle that still goes on, In silence, round me, — the perpetual work Of thy creation, finished, yet renewed Forever.
Seite 191 - There is then no alternative but to accept the result that a Tertiary flora wax contemporaneous with a Cretaceous fauna, establishing an uninterrupted succession of life across what is generally regarded as one of the greatest breaks in geologic time.
Seite 148 - ... on' the floor. The destruction having reached the thin-bedded strata above, the breaking down has proceeded with greater rapidity, each bed breaking away over a narrower area than that below it. When the heavily-bedded rock has been again reached, the breakage has ceased, and the stratum remains as a heavy coping stone to the hollow dome. Of course the process piles a hill beneath, and the access of water being rendered more easy by the approach to the surface, great stalactites and stalagmites...
Seite 259 - ... or head, or tongue, or fore-limbs elongated a very little without any corresponding modification in other parts of the body ; and animals thus slightly modified would, during a dearth, have a slight advantage, and be enabled to browse on higher twigs, and thus survive. A few mouthfuls more or less every day would make all the difference between life and death. By the repetition of the same process, and by the occasional intercrossing of the survivors, there would be some progress, slow and fluctuating...
Seite 193 - Titanosaurus montanus),* from Colorado, is by far the largest land animal yet discovered ; its dimensions being greater than was supposed possible, in an animal that lived and moved upon the land. It was some fifty or sixty feet in length, and, when erect, at least thirty feet in height. It doubtless fed upon the foliage of the mountain forests, portions of which are preserved with its remains.
Seite 283 - We are inclined to pronounce it, on the whole, the best of its class and site. . . . The maps are £ir the best we remember seeing in any American book of this class, and the portraits are large and most of them very good ones.
Seite 251 - This is the more extraordinary, in view of the fact that, from the lowest limit in existing men there are all possible gradations up to the highest ; while below that limit there is an abrupt fall to the ape level, in which the cubic capacity of the brain is one half less.
Seite 265 - For the development of Man, gifted with high reason and will, and thus made a power above Nature, there was required, as Wallace has urged, the special act of a Being above Nature, whose supreme will is not only the source of natural law, but the working force of Nature herself.
Seite 226 - ... the least of them sixty feet in height, some of them half a mile long and two hundred feet high. Only one-eighth of the volume of floating ice appears above water, and many of these great bergs may thus touch the ground in a depth of thirty fathoms or more, so that if we imagine four hundred of them moving up and down under the influence of the current, oscillating slowly with the motion of the sea, and grinding on the rocks and stone-covered bottom at all depths from the centre of the channel,...
Seite 262 - ... fixity of the species which inhabit it ; that in the future even more than in the past, faith in an order, which is the basis of science, will not — as it cannot reasonably — be dissevered from faith in an Ordainer, which is the basis of religion.