The Geological ObserverLongman, Brown, Green, and Longmans, 1853 - 740 стор. |
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Сторінка xii
... granites in South - western England and South - eastern Ireland - Outline of the granite range of Wicklow - Granite veins - Chemical composition of granitic rocks - Schorlaceous granites of Cornwall and Devon -Slight covering of granite ...
... granites in South - western England and South - eastern Ireland - Outline of the granite range of Wicklow - Granite veins - Chemical composition of granitic rocks - Schorlaceous granites of Cornwall and Devon -Slight covering of granite ...
Сторінка xiii
... granite - Joints in sedimentary rocks — Joints among conglomerates — Joints in limestone - Movement of rocks after jointing - Complication of bedding , jointing , and cleavage 614-631 CHAPTER XXXIII . Bending , contortion , and fracture ...
... granite - Joints in sedimentary rocks — Joints among conglomerates — Joints in limestone - Movement of rocks after jointing - Complication of bedding , jointing , and cleavage 614-631 CHAPTER XXXIII . Bending , contortion , and fracture ...
Сторінка xix
... 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 por- phyritic ...
... 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 por- phyritic ...
Сторінка 2
... granites , greenstones , and the like , he will find that the decomposition of felspar is among the chief causes of the disintegration of the igneous masses of which this mineral may form a part . It would be out of place here to enter ...
... granites , greenstones , and the like , he will find that the decomposition of felspar is among the chief causes of the disintegration of the igneous masses of which this mineral may form a part . It would be out of place here to enter ...
Сторінка 3
... granite ; ce solid rounded masses of un- decomposed granite , included in the decomposed part ; and d d solid granite . In such a section as this , great care should , however , be taken to ascertain that ce are not transported boulders ...
... granite ; ce solid rounded masses of un- decomposed granite , included in the decomposed part ; and d d solid granite . In such a section as this , great care should , however , be taken to ascertain that ce are not transported boulders ...
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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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