The New Encyclopaedia Britannica: Macropaedia (19 v.)Encyclopaedia Britannica, 1983 - Encyclopedias and dictionaries |
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Page 202
... minerals in addition to the amounts of silica required to form all other mineral constituents that are present . Cor- respondingly , in this context undersaturated rocks , which include all ultrabasic as well as some basic and intermedi ...
... minerals in addition to the amounts of silica required to form all other mineral constituents that are present . Cor- respondingly , in this context undersaturated rocks , which include all ultrabasic as well as some basic and intermedi ...
Page 206
... minerals and the darker colours of most mafic minerals can be useful in- dications of general rock composition . Colour index , which is either employed directly or is implied in nearly all classifications of igneous rocks , is simply ...
... minerals and the darker colours of most mafic minerals can be useful in- dications of general rock composition . Colour index , which is either employed directly or is implied in nearly all classifications of igneous rocks , is simply ...
Page 225
... minerals crystallize from the vapour as well as from the liquid . Formation When minerals begin to precipitate from a vapour asso- of ciated with magmatic liquid , the orthomagmatic stage pegmatites ends , and the pegmatitic stage ...
... minerals crystallize from the vapour as well as from the liquid . Formation When minerals begin to precipitate from a vapour asso- of ciated with magmatic liquid , the orthomagmatic stage pegmatites ends , and the pegmatitic stage ...
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activity andesite Antarctic antibodies antigen atoms basalt basin bonds carbon cause cells centimetres central centre century chemical composition crystals cultural cycle cyclone earth economic effect eruption evaporation example feet feldspar feldspathoids flow freezing gabbro glaciers groundwater hallucinations heat hockey humidity Hungarian Hungary hydrocarbons hydrogen hydrograph hydrologic hydrologic cycle hypnosis Ibn Khaldun ice sheets icebergs Iceland ideology igneous rocks Illinois illusion immunoglobulin immunological important increase India industrial intrusive kilometres lakes land lava layers lymphocytes mafic magma major melting ment metres miles millimetres minerals molecules mountain North northern occur ocean parasitic percent philosophy plagioclase political population precipitation pressure produced pyroxene rainfall reaction region relatively result river runoff snow social soil specific square kilometres structure surface temperature theory tion types United vapour volcanic western wind zone