The New Geology: A Textbook for Colleges, Normal Schools, and Training Schools; and for the General ReaderPacific Press publishing association, 1923 - 726 pages |
From inside the book
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Page 11
... SILURIAN SYSTEM 392-402 Extent and Subdivisions . Lithic Characters . Distribution . Life . Salt and Gypsum Beds . " Extinct Species . " XXVI . FOSSIL FISHES • 403-408 Definition . Structure . Subdivisions . Elasmobranchs . Ostracoderms ...
... SILURIAN SYSTEM 392-402 Extent and Subdivisions . Lithic Characters . Distribution . Life . Salt and Gypsum Beds . " Extinct Species . " XXVI . FOSSIL FISHES • 403-408 Definition . Structure . Subdivisions . Elasmobranchs . Ostracoderms ...
Page 82
... Silurian or Carboniferous ones . Often a bed of coral limestone , for instance , thins out at short intervals , being in mere isolated pieces 100 feet or 1,000 feet or so in length , called lenticular masses , sandstone or shale occupy ...
... Silurian or Carboniferous ones . Often a bed of coral limestone , for instance , thins out at short intervals , being in mere isolated pieces 100 feet or 1,000 feet or so in length , called lenticular masses , sandstone or shale occupy ...
Page 87
... Silurian . ( Walcott , U. S. G. S. ) clined , sometimes being even up on edge , so as to make their surfaces vertical . In some cases , they are bent like wrinkles in a piece of cloth whose edges have been pushed toward each other ...
... Silurian . ( Walcott , U. S. G. S. ) clined , sometimes being even up on edge , so as to make their surfaces vertical . In some cases , they are bent like wrinkles in a piece of cloth whose edges have been pushed toward each other ...
Page 96
... Silurian . ( Walcott , U. S. G. S. ) FIG . 48. Limestone cliff at Newsom , Tennessee , illustrating " deceptive conformity . " At the top are black shales of the Mississippi ( L. Carbon- iferous ) , resting conformably on six feet of ...
... Silurian . ( Walcott , U. S. G. S. ) FIG . 48. Limestone cliff at Newsom , Tennessee , illustrating " deceptive conformity . " At the top are black shales of the Mississippi ( L. Carbon- iferous ) , resting conformably on six feet of ...
Page 202
... Silurian , Carboniferous , or Cretaceous , as the case may be , merely because no other formation has yet included them within . its sphere of influence , and the other popular hypothesis about the originally igneous condition of the ...
... Silurian , Carboniferous , or Cretaceous , as the case may be , merely because no other formation has yet included them within . its sphere of influence , and the other popular hypothesis about the originally igneous condition of the ...
Contents
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Common terms and phrases
America ancient Archæan areas bottom brachiopods calcareous calcium carbonate called Cambrian Cañon Carboniferous changes chemical classed clay coal beds coast common composed contain corals Cretaceous crinoids crystalline Dana deep deposits depth Devonian diatoms dolomite earth earthquake Eocene erosion Europe evidence extend fact feet feldspar fishes Foraminifera formation forms fossiliferous found as fossils gastropods genera geological geologists glacier Grabau index fossils iron Jurassic kinds known Lake land latter lava layers limestone living localities lower marine mass materials Mesozoic mineral modern mollusks mountain North numbers occur ocean ooze Ordovician origin oxide Paleozoic Permian plants and animals present quartz reef regions reptiles river rocks sand sandstone sediments shales shells shore side siliceous Silurian similar skeleton South species square miles strata stratified structure supposed surface Tertiary theory thick tion Triassic trilobites tropical true types Upper usually Valley valve various volcanoes waves
Popular passages
Page 246 - There rolls the deep where grew the tree. O earth, what changes hast thou seen! There where the long street roars, hath been The stillness of the central sea. The hills are shadows, and they flow From form to form, and nothing stands ; They melt like mist, the solid lands, Like clouds they shape themselves and go.
Page 526 - You will observe by these remains The creature had two sets of brains — One in his head (the usual place), The other at his spinal base. Thus he could reason a priori As well as a posteriori.
Page 592 - But never in the history of science did a stranger hallucination arise than that of Cuvier and the modern school, when they supposed themselves to discard theory and build on a foundation of accurately ascertained fact. Never was a system devised in which theory was more rampant; theory, too, unsupported by observation, and, as we now know, utterly erroneous.
Page 526 - Twas rescued by the one behind: And if in error he was caught He had a saving afterthought. As he thought twice before...
Page 308 - But that particular and essential bit of the theory of evolution which is concerned with the origin and nature of species remains utterly mysterious. We no longer feel as we used to do, that the process of variation, now contemporaneously occurring, is the beginning of a work which needs merely the element of time for its completion; for even time can not complete that which has not yet begun.
Page 584 - We live in a zoologically impoverished world, from which all the hugest, and fiercest, and strangest forms have recently disappeared ; and it is, no doubt, a much better world for us now they have gone.
Page 592 - Werner and his school, when they supposed themselves to discard theory and build on a foundation of accurately-ascertained fact. Never was a system devised in which theory was more rampant ; theory, too, unsupported by observation, and, as we now know, utterly erroneous. From beginning to end of Werner's method and its applications, assumptions were made for which there was no ground, and these assumptions were treated as demonstrable facts. The very point to be proved was taken for granted, and...
Page 531 - ... these creatures is a marvel of mechanical design; the bones of the vertebral column are of the lightest possible construction consistent with strength, the bony material being laid down only where stresses arise, and reduced to a minimum at other points. The assembled skeleton reminds one forcibly of a cantilever bridge borne on two massive piers — the limbs — between which the trunk represents the shorter channel span, and the long neck and tail the spans leading to the shores. Over the...
Page 419 - At this period of our history, some terrible catastrophe involved in sudden destruction the Fish of an area at least a hundred miles from boundary to boundary, perhaps much more. The same platform in Orkney as at Cromarty is strewed thick with remains, which exhibit unequivocally the marks of violent death. The figures are contorted, contracted, curved, the tail in many instances is bent round to the head; the spines stick out; the fins are spread to the full, as in fish that die in convulsions...
Page 419 - Pterichthyes of the Lower Old Red Sandstone are to be found. We read in the stone a singularly preserved story of the strong instinctive love of life, and of the mingled fear and anger implanted for its preservation — " The champions in distorted postures threat.