The Geological ObserverLongman, Brown, Green, and Longmans, 1853 - 740 стор. |
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Сторінка xiii
... lime in rocks - Spheroidal concretions in the Silurian rocks -Crystals of iron pyrites in clays and shales - Mode of occurrence of sul- phate of lime - Modification in the structure of rocks from exposure to changes of temperature ...
... lime in rocks - Spheroidal concretions in the Silurian rocks -Crystals of iron pyrites in clays and shales - Mode of occurrence of sul- phate of lime - Modification in the structure of rocks from exposure to changes of temperature ...
Сторінка xviii
... lime is a marked ingredient , in addition to the silicate of magnesia , another essential sub- stance , and protoxide of iron , generally present , sometimes replacing much of the lime and magnesia . In this division , therefore , are ...
... lime is a marked ingredient , in addition to the silicate of magnesia , another essential sub- stance , and protoxide of iron , generally present , sometimes replacing much of the lime and magnesia . In this division , therefore , are ...
Сторінка xix
Henry Thomas De La Beche. sufficient lime in addition to make it essentially a silicate of lime and magnesia , with also a marked quantity of oxide of iron . In the compound , sometimes largely crystallized , termed diallage rock ...
Henry Thomas De La Beche. sufficient lime in addition to make it essentially a silicate of lime and magnesia , with also a marked quantity of oxide of iron . In the compound , sometimes largely crystallized , termed diallage rock ...
Сторінка 2
... lime . b . In part often replaced by lime or potash . c . Commonly , also , containing potash and lime . remains , and to a certain extent protects the solid 2 [ CH . I. DECOMPOSITION OF ROCKS .
... lime . b . In part often replaced by lime or potash . c . Commonly , also , containing potash and lime . remains , and to a certain extent protects the solid 2 [ CH . I. DECOMPOSITION OF ROCKS .
Сторінка 4
... lime and magnesia , in variable proportions , these substances replacing each other , and sometimes also being partly replaced by protoxide of iron . c represent the different parts of a granitic dyke , DECOMPOSITION OF ROCKS . [ CH . I.
... lime and magnesia , in variable proportions , these substances replacing each other , and sometimes also being partly replaced by protoxide of iron . c represent the different parts of a granitic dyke , DECOMPOSITION OF ROCKS . [ CH . I.
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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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