Class-book of GeologyMacmillan, 1896 - 404 páginas |
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Página vi
... books . I have to thank Messrs . J. D. Cooper and M. Lacour for the skill with which they have given in wood - engraving the expression of the originals . In preparing the Second Edition , I have thoroughly revised vi PREFACE.
... books . I have to thank Messrs . J. D. Cooper and M. Lacour for the skill with which they have given in wood - engraving the expression of the originals . In preparing the Second Edition , I have thoroughly revised vi PREFACE.
Página xi
... ORIGINAL STRUCTURES CHAPTER XIII SEDIMENTARY ROCKS STRUCTURES SUPERINDUCED IN THEM AFTER THEIR FORMATION CHAPTER XIV ERUPTIVE ROCKS AND MINERAL VEINS IN THE ARCHI- TECTURE OF THE EARTH'S CRUST . CHAPTER XV HOW FOSSILS HAVE BEEN ENTOMBED ...
... ORIGINAL STRUCTURES CHAPTER XIII SEDIMENTARY ROCKS STRUCTURES SUPERINDUCED IN THEM AFTER THEIR FORMATION CHAPTER XIV ERUPTIVE ROCKS AND MINERAL VEINS IN THE ARCHI- TECTURE OF THE EARTH'S CRUST . CHAPTER XV HOW FOSSILS HAVE BEEN ENTOMBED ...
Página xv
... original structures of the stone are revealed by weathering ) PAGE 12 2. Passage of sandstone upwards into soil 15 3. Passage of granite upwards into soil 15 4. Talus - slopes at the foot of a line of cliffs 19 5. Section of rain - wash ...
... original structures of the stone are revealed by weathering ) PAGE 12 2. Passage of sandstone upwards into soil 15 3. Passage of granite upwards into soil 15 4. Talus - slopes at the foot of a line of cliffs 19 5. Section of rain - wash ...
Página 12
... original polish that may here and there have escaped , serve as a measure of how much has actually been removed from the rest of the surface . Now , if in the lapse of time , stone which has been artificially dressed is wasted away , we ...
... original polish that may here and there have escaped , serve as a measure of how much has actually been removed from the rest of the surface . Now , if in the lapse of time , stone which has been artificially dressed is wasted away , we ...
Página 15
... original position . As these fragments are attacked by percolating moisture , their surfaces decay , leaving the still unweathered parts as rounded blocks ( b ) , which might at first be mistaken for transported boulders . They are ...
... original position . As these fragments are attacked by percolating moisture , their surfaces decay , leaving the still unweathered parts as rounded blocks ( b ) , which might at first be mistaken for transported boulders . They are ...
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Términos y frases comunes
abundant abundantly accumulated acid Ammonites basin beds bones bottom Brachiopods calcareous calcite Cambrian carbonate of lime Carboniferous Chapter characteristic chiefly clay containing corals Cretaceous crinoids crystalline crystals decay deposits detritus Devonian earth earth's crust Eocene eruptive rocks Europe evidence example extinct fauna feet thick fishes fissures formations fossils genera geological history geologist glacier globe gneiss gradually granite gravel ground iron Jurassic kinds known lakes land lava layers limestone living lower marine marls mass materials Mesozoic miles Miocene molten mountains natural North occur Old Red Sandstone organic remains original Palæozoic period Permian plants and animals Pliocene present preserved probably quartz rain regions represented rivers sand schists sea-floor sediment sedimentary rocks shales sheets shells siliceous Silurian slopes soil solid sometimes species stone strata stratified stream structure substance surface terrestrial Tertiary trace Triassic Trilobites upper valley various vegetation vent volcanic