Class-book of GeologyMacmillan and Company, 1890 - 516 páginas |
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Página xv
... layers of growth in a stalactite 21. Travertine with impressions of leaves 22. Glaciers and moraines 23. Perched blocks scattered over ice - worn surface of rock 24. Stone smoothed and striated by glacier - ice . 35 37 37 38 43 44 45 46 ...
... layers of growth in a stalactite 21. Travertine with impressions of leaves 22. Glaciers and moraines 23. Perched blocks scattered over ice - worn surface of rock 24. Stone smoothed and striated by glacier - ice . 35 37 37 38 43 44 45 46 ...
Página xvii
... layer of sediment . 84. Rain - prints on fine mud 85. Vertical trees ( Sigillaria ) in sandstone , Swansea ( Logan ) 86. Hills formed out of horizontal sedimentary rocks · 87. Section of overlap 88. Unconformability 89. Joints in a ...
... layer of sediment . 84. Rain - prints on fine mud 85. Vertical trees ( Sigillaria ) in sandstone , Swansea ( Logan ) 86. Hills formed out of horizontal sedimentary rocks · 87. Section of overlap 88. Unconformability 89. Joints in a ...
Página 3
... layers or deposits from which the evidence is derived . The upper layer is that which contains the foundations and rubbish of modern London . Next comes that which encloses the relics of the Roman occupation . At the bottom lies the layer ...
... layers or deposits from which the evidence is derived . The upper layer is that which contains the foundations and rubbish of modern London . Next comes that which encloses the relics of the Roman occupation . At the bottom lies the layer ...
Página 4
... layers of oysters and other sea - shells . These remains , spread out like similar shells on the beach or bed of the sea at the present day , enable us to infer that where they lie the sea once rolled . Pits , quarries , or other ...
... layers of oysters and other sea - shells . These remains , spread out like similar shells on the beach or bed of the sea at the present day , enable us to infer that where they lie the sea once rolled . Pits , quarries , or other ...
Página 5
... layer of marl would have conveyed no intelligible meaning . But knowing and recognising these peculiarities , we feel sure that the marl marks the site of a former lake . Thus the study of the Present supplies a key that unlocks the ...
... layer of marl would have conveyed no intelligible meaning . But knowing and recognising these peculiarities , we feel sure that the marl marks the site of a former lake . Thus the study of the Present supplies a key that unlocks the ...
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Términos y frases comunes
abundant accumulated acid Ammonites ancient Assistant Master beds BOOK bottom Brachiopods calcareous calcite Cambrian Cambridge carbonate of lime Carboniferous Chapter chiefly clay College containing corals Cretaceous crinoids crystalline crystals decay deposits detritus Devonian earth earth's crust Edited ELEMENTARY Eocene eruptive Europe evidence example extinct fauna Fcap feet fissures fossils genera GEOGRAPHY geological history glacier globe gradually granite gravel GREEK ground Illustrated Jurassic kinds known lakes land lava layers limestone living lower marine marls mass materials Mesozoic mineral Miocene molten mountains natural occur Old Red Sandstone organic remains original Palæozoic period Permian plants and animals Pliocene present preserved Prof Professor quartz Red Sandstone regions revised rivers rocks sand schists sediment sedimentary sedimentary rocks shales sheets shells siliceous Silurian soil solid sometimes species stone strata structure substance surface terrestrial Tertiary thick trace Triassic upper various vegetation volcanic
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