page_title: Nepheline syenite
hierarchical_section_title: Nepheline syenite
caption_attribution_description: English: Hand sample of Nepheline syenite of the Ordovician Beemerville Complex, northern New Jersey. Unweathered surface shown on left, weathered surface shown on right (with some sparse moss). Collected 21 Oct. 2012.
context_page_description: Nepheline syenite is a holocrystalline plutonic rock that consists largely of nepheline and alkali feldspar. The rocks are mostly pale colored, grey or pink, and in general appearance they are not unlike granites, but dark green varieties are also known. Phonolite is the fine-grained extrusive equivalent.
context_section_description: Nepheline syenite is a holocrystalline plutonic rock that consists largely of nepheline and alkali feldspar. The rocks are mostly pale colored, grey or pink, and in general appearance they are not unlike granites, but dark green varieties are also known. Phonolite is the fine-grained extrusive equivalent.
caption: Hand samples of nepheline syenite of the Ordovician Beemerville Complex, northern New Jersey
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