Class-book of GeologyMacmillan and Company, 1890 - 516 páginas |
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Página xvi
... lava with a few of the cells filled up with infiltrated mineral matter ( Amygdules ) 36. Section of a lava - current 37. Elongation of cells in direction of flow of a lava - stream . PAGE 67 71 73 74 77 82 84 85 86 87 97 888888 98 99 38 ...
... lava with a few of the cells filled up with infiltrated mineral matter ( Amygdules ) 36. Section of a lava - current 37. Elongation of cells in direction of flow of a lava - stream . PAGE 67 71 73 74 77 82 84 85 86 87 97 888888 98 99 38 ...
Página xvii
... lava , in a paste of finer volcanic debris . 149 74. Conglomerate 150 • 75. Concretionary forms assumed by Dolomite , Magnesian Limestone , Durham 156 76. Weathered surface of crinoidal limestone 159 77. Group of crystals of felspar ...
... lava , in a paste of finer volcanic debris . 149 74. Conglomerate 150 • 75. Concretionary forms assumed by Dolomite , Magnesian Limestone , Durham 156 76. Weathered surface of crinoidal limestone 159 77. Group of crystals of felspar ...
Página 86
... impressive example of how extensive. FIG . 33. - Globigerina ooze dredged up by Challenger Expedition from a depth of 1900 fathoms in the North Atlantic ( 25 ) . FIG . 35. - Cellular Lava with a few of. 86 CHAP . RECORDS OF PLANTS AND ...
... impressive example of how extensive. FIG . 33. - Globigerina ooze dredged up by Challenger Expedition from a depth of 1900 fathoms in the North Atlantic ( 25 ) . FIG . 35. - Cellular Lava with a few of. 86 CHAP . RECORDS OF PLANTS AND ...
Página 95
... lava are discharged , till they gradually pile up the volcanic cone round the vent whence they escape . A volcanic cone , so long as it remains , bears eloquent testimony to the nature of the causes that produced it . Even many ...
... lava are discharged , till they gradually pile up the volcanic cone round the vent whence they escape . A volcanic cone , so long as it remains , bears eloquent testimony to the nature of the causes that produced it . Even many ...
Página 96
... lava - streams that descend from them will be cut into ravines and isolated into separate masses by the streams that have even already deeply trenched them . Where all the ordinary and familiar signs of a volcano have been removed , how ...
... lava - streams that descend from them will be cut into ravines and isolated into separate masses by the streams that have even already deeply trenched them . Where all the ordinary and familiar signs of a volcano have been removed , how ...
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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 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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