Class-book of GeologyMacmillan and Company, 1890 - 516 σελίδες |
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Σελίδα 4
... substance , composed of mosses and other water - loving plants , is formed in boggy places by the growth of marshy vegetation . Below the peat there might occur a layer of soft white marl full of lake - shells , such as may be observed ...
... substance , composed of mosses and other water - loving plants , is formed in boggy places by the growth of marshy vegetation . Below the peat there might occur a layer of soft white marl full of lake - shells , such as may be observed ...
Σελίδα 7
... substances have been grouped together so as to form such a building . In like manner , besides the nature and mode of origin of the various rocks of which the visible and accessible part of the earth consists , we ought to know how ...
... substances have been grouped together so as to form such a building . In like manner , besides the nature and mode of origin of the various rocks of which the visible and accessible part of the earth consists , we ought to know how ...
Σελίδα 14
... substances which can still take more of this gas , causing them to rust ( pp . 117 , 123 ) . As a consequence of this alteration , the cohesion of the particles is usually weakened , and the stone crumbles down . With the carbon ...
... substances which can still take more of this gas , causing them to rust ( pp . 117 , 123 ) . As a consequence of this alteration , the cohesion of the particles is usually weakened , and the stone crumbles down . With the carbon ...
Σελίδα 25
... substance thus invisibly transported consists of various salts . One of the most abundant of these carbonate of lime is the substance that forms lime- stone , and furnishes the mineral matter required for the hard parts of a large ...
... substance thus invisibly transported consists of various salts . One of the most abundant of these carbonate of lime is the substance that forms lime- stone , and furnishes the mineral matter required for the hard parts of a large ...
Σελίδα 46
... substance in which few or no shells may be recognisable ( Fig . 17 ) . On the sites of lakes that have been naturally filled up or artificially drained , such marl has been extensively dug as a manure for land . Besides the shells from ...
... substance in which few or no shells may be recognisable ( Fig . 17 ) . On the sites of lakes that have been naturally filled up or artificially drained , such marl has been extensively dug as a manure for land . Besides the shells from ...
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Άλλες εκδόσεις - Προβολή όλων
Συχνά εμφανιζόμενοι όροι και φράσεις
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 mountains natural occur Old Red Sandstone organic remains original Palæozoic Paleozoic 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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