The Geological ObserverLongman, Brown, Green, and Longmans, 1853 - 740 стор. |
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Сторінка xix
... manner certain granites become porphyritic , from separate crystals of felspar being scattered among the general compound , confusedly crystallized , and the rock is then called a porphyritic granite . Even serpentines become in a manner ...
... manner certain granites become porphyritic , from separate crystals of felspar being scattered among the general compound , confusedly crystallized , and the rock is then called a porphyritic granite . Even serpentines become in a manner ...
Сторінка xxi
... manner in which marine inver- tebrate animals now live , and the mode in which the remains of similar animals occur amid the fossiliferous rocks , are such , that this division of life seems now very generally admitted as the most ...
... manner in which marine inver- tebrate animals now live , and the mode in which the remains of similar animals occur amid the fossiliferous rocks , are such , that this division of life seems now very generally admitted as the most ...
Сторінка xxiv
... manner that many other con- glomerates are included in groups of rocks bearing given names ; in fact , be the beaches of different portions of the time required for the whole deposit ; yet they , with the muds , silts , and sands of the ...
... manner that many other con- glomerates are included in groups of rocks bearing given names ; in fact , be the beaches of different portions of the time required for the whole deposit ; yet they , with the muds , silts , and sands of the ...
Сторінка xxv
... manner . Thus , the altered rocks afford such minerals as andalusite ( especially a silicate of alumina , the base of clays ) , chiastolite ( another mineral , in which silicate of alumina is the chief ingredient ) , cyanite ( another ...
... manner . Thus , the altered rocks afford such minerals as andalusite ( especially a silicate of alumina , the base of clays ) , chiastolite ( another mineral , in which silicate of alumina is the chief ingredient ) , cyanite ( another ...
Сторінка xxvi
... manner in which they can be acted upon by the influences noticed , either on the minor or large scale , the general result could scarcely be otherwise than of the most varied kind . To attempt , therefore , a classification of these ...
... manner in which they can be acted upon by the influences noticed , either on the minor or large scale , the general result could scarcely be otherwise than of the most varied kind . To attempt , therefore , a classification of these ...
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Загальні терміни та фрази
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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