The Geological ObserverLongman, Brown, Green, and Longmans, 1853 - 740 sider |
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Side 39
... cinders . In the case of a lava current traversing a valley , the deepest part of a lake thus formed might be at the lower part , as in the annexed section ( fig . 35 ) , where CH . III . ] 39 REMOVAL OF LAKES BY RIVERS .
... cinders . In the case of a lava current traversing a valley , the deepest part of a lake thus formed might be at the lower part , as in the annexed section ( fig . 35 ) , where CH . III . ] 39 REMOVAL OF LAKES BY RIVERS .
Side 70
... cinders , and fragments of rock ceased , it was cut away by them , and reduced to a shoal . During the time that this volcanic mass was accumulating , a large amount of ashes and cinders must have been mingled with the adjacent sea ...
... cinders , and fragments of rock ceased , it was cut away by them , and reduced to a shoal . During the time that this volcanic mass was accumulating , a large amount of ashes and cinders must have been mingled with the adjacent sea ...
Side 71
... cinders , more or less mingled with the remains of organic life , these remains themselves sometimes sufficient to form long - continued layers or beds . Though , for convenience , the Mediterranean has been treated as a tideless sea ...
... cinders , more or less mingled with the remains of organic life , these remains themselves sometimes sufficient to form long - continued layers or beds . Though , for convenience , the Mediterranean has been treated as a tideless sea ...
Side 99
... cinders , and ashes . Instead of simply accumulating around the igneous vent , as would happen , with certain modifications from the distribution of wind- borne ashes and small local movements of water in tideless seas , not only might ...
... cinders , and ashes . Instead of simply accumulating around the igneous vent , as would happen , with certain modifications from the distribution of wind- borne ashes and small local movements of water in tideless seas , not only might ...
Side 100
... cinders being thrown to the height of 700 and 800 feet , an island was formed , about 300 feet high , and about one mile in circumference . Fortunately the formation of this island was observed and recorded . It was first discovered ...
... cinders being thrown to the height of 700 and 800 feet , an island was formed , about 300 feet high , and about one mile in circumference . Fortunately the formation of this island was observed and recorded . It was first discovered ...
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accumulations acid action alumina amid animals appear ashes beach beds beneath blocks bottom breakers British Islands calcareous carbonate carbonic acid cavities cinders clay cliffs coal coast considerable considered coral reefs Cornwall crater crystals deposits depth detritus district dry land earthquake Edition effected elevated eruption estuary evidence exposed fathoms feet felspar fissures formed fragments geological glaciers granite ground hornblende igneous rocks inferred kind lakes lava lime limestone magnesia manner marine mass mechanical suspension Mendip Hills miles mineral matter mode of occurrence modifications molluscs molten mountain noticed observer occur ocean old red sandstone oolitic organic remains pebbles portions present produced Professor quartz red sandstone regards regions respect rise river sand sea-bottom section fig seen shells shores side silicates Silurian Sir James Ross sometimes species specific gravity streams substances sufficient surface temperature thrown tidal tide tion trachytic traversed various vegetable veins volcanic
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