page_title: Syenite
hierarchical_section_title: Syenite
caption_attribution_description: Siim Sepp, 2005 Diameter of rock sample is app. 15 cm. Rock name is särnaite (leucocratic variety of nepheline syenite) and it is from Sweden.
context_page_description: Syenite is a coarse-grained intrusive igneous rock with a general composition similar to that of granite, but deficient in quartz, which, if present at all, occurs in relatively small concentrations. Some syenites contain larger proportions of mafic components and smaller amounts of felsic material than most granites; those are classed as being of intermediate composition. The volcanic equivalent of syenite is trachyte.
context_section_description: Syenite is a coarse-grained intrusive igneous rock with a general composition similar to that of granite, but deficient in quartz, which, if present at all, occurs in relatively small concentrations (< 5%). Some syenites contain larger proportions of mafic components and smaller amounts of felsic material than most granites; those are classed as being of intermediate composition. The volcanic equivalent of syenite is trachyte.
caption: leucocratic variety of nepheline syenite from Sweden (särnaite)
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