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14.1 Sodalite-hastingsite nepheline syenite. Red Hill Complex, New Hampshire.  Gray nepheline and greenish-gray sodalite are associated with abundant white to medium gray alkali feldspar, locally showing pronounced cleavage.  The black, rectangular grains are the alkali amphibole, hastingsite, and a few metallic grains of magnetite occur as minor accessory minerals. [Scale shows cm divisions.]
14.1 Sodalite-hastingsite nepheline syenite. Red Hill Complex, New Hampshire. Gray nepheline and greenish-gray sodalite are associated with abundant white to medium gray alkali feldspar, locally showing pronounced cleavage. The black, rectangular grains are the alkali amphibole, hastingsite, and a few metallic grains of magnetite occur as minor accessory minerals. [Scale shows cm divisions.]

Image 33 of 156

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