The New Encyclopaedia Britannica: Macropaedia: knowledge in depth. 19 vEncyclopaedia Britannica, Incorporated, 1981 - Encyclopedias and dictionaries |
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Page 283
Early experi- mental work The nine principal elements of igneous rocks The rock- forming minerals Degree of crystal ... Igneous Rocks 201.
Early experi- mental work The nine principal elements of igneous rocks The rock- forming minerals Degree of crystal ... Igneous Rocks 201.
Page 284
The rock- forming minerals Degree of crystal- linity. T T T Table 1 : Major Oxide Constituents of Igneous Rocks 20 19 constituent common range approximate 18 ( weight percent ) average value ( weight percent ) 17 16 Silica ( SiO2 ) ...
The rock- forming minerals Degree of crystal- linity. T T T Table 1 : Major Oxide Constituents of Igneous Rocks 20 19 constituent common range approximate 18 ( weight percent ) average value ( weight percent ) 17 16 Silica ( SiO2 ) ...
Page 302
... rocks . Extrusive rocks , particularly basalt lavas , are most important in this regard , by virtue of their great areal extent , great susceptibility to weathering , and ... Igneous Rocks * ( in percentage ) 220 Igneous Rocks , Intrusive.
... rocks . Extrusive rocks , particularly basalt lavas , are most important in this regard , by virtue of their great areal extent , great susceptibility to weathering , and ... Igneous Rocks * ( in percentage ) 220 Igneous Rocks , Intrusive.
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andesite Antarctic antibodies antigen atoms basalt basin bonds carbon cause cells centimetres central centre century chemical composition crystals cultural cycle cyclone earth east economic effect eruption evaporation feet feldspar feldspathoids flow freezing gabbro glaciers groundwater humidity Hungarian Hungary hunting hydrocarbons hydrogen hydrograph hydrologic hydrologic cycle hypnosis ice sheets icebergs Iceland ideology igneous rocks Illinois immunoglobulin immunological important increase India Indian industry intrusive kilometres king known lakes land lava layers lymphocytes mafic magma major melting ment metres miles millimetres minerals molecules mountain natural northern occur ocean parasitic percent philosophy plagioclase political population precipitation pressure produced rainfall range reaction region relatively result Reykjavík river runoff Samkhya snow social soil square kilometres structure surface temperature theory tion ture types United vapour Vedānta volcanic western wind zone