The Geological ObserverLongman, Brown, Green, and Longmans, 1853 - 740 стор. |
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Сторінка xvii
... obtained by means of the accumulations with which they may be associated , and to which relative geological dates can be assigned . Having entered upon these characters in the sequel , the following sketch of the more prominent of the ...
... obtained by means of the accumulations with which they may be associated , and to which relative geological dates can be assigned . Having entered upon these characters in the sequel , the following sketch of the more prominent of the ...
Сторінка xix
... obtained dispersed through ordinary glass . In the arrangement of particles , beyond the vitreous condition , forming the compact and stony state , the porphyritic character is not rare among rocks ; crystals , such as those of felspar ...
... obtained dispersed through ordinary glass . In the arrangement of particles , beyond the vitreous condition , forming the compact and stony state , the porphyritic character is not rare among rocks ; crystals , such as those of felspar ...
Сторінка 14
... obtain not only breccias and conglomerates upon the land , by the evaporation of water , charged with bicarbonate of ... obtained of the amount of soluble matter transported . river waters . When we consider the number of rocks 14 [ CH ...
... obtain not only breccias and conglomerates upon the land , by the evaporation of water , charged with bicarbonate of ... obtained of the amount of soluble matter transported . river waters . When we consider the number of rocks 14 [ CH ...
Сторінка 16
... obtained in its passage through the vegetable covering and soil . Not being able to permeate readily through the subjacent clay , b b b , it would be thrown out as spring water at the junction of the two rocks . This water would ...
... obtained in its passage through the vegetable covering and soil . Not being able to permeate readily through the subjacent clay , b b b , it would be thrown out as spring water at the junction of the two rocks . This water would ...
Сторінка 17
Henry Thomas De La Beche. they would not show those obtained from any kind of rock taken by itself . These , consequently , would have to be studied where the springs flowed from each bed . The streams , moreover , con- tain the top ...
Henry Thomas De La Beche. they would not show those obtained from any kind of rock taken by itself . These , consequently , would have to be studied where the springs flowed from each bed . The streams , moreover , con- tain the top ...
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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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