The New Encyclopædia BritannicaEncyclopædia 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 amount antigen appear atoms become body bonds called cause central centre century common contain continued cover crystals cultural determined direct early east economic effect evaporation example fall feet Figure flow force glaciers Hungary hydrogen icebergs important income increase India individual industry internal Italy knowledge known lakes land later less major mass material means measure melting ment method metres miles minerals molecules natural North occur ocean organic origin percent period philosophy political population position present pressure produced range reaction regions relatively remains response result rise river rocks social soil structure supply surface temperature theory tion types United University usually various western wind