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Isnephelene Sodalite Syenite

(31) nepheline syenite gneiss,general lithology:nepheline syenite gneiss below the surface of the earth, forming the minerals nepheline (grey), sodalite (blue) and cancrinite (orange)..corundiferous nepheline-syenite from eastern ontario,patches of blue sodalite. no feldspar was seen in the dik unlike examples described by adams,' and no corundum found in it. as usual in nepheline-syenites .petrology of the marginal part of mbozi syenitegabbro ,large plates of undcformed plagioclase enclosing pyroxene and nepheline crystals to a protoclastic nepheline syenite and nepheline-sodalite syenite in which .

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