syenite Englisch Deutsch:
| Syenit m min. | syenite |
| Dresdner Syenit m geol. | Dresden syenite plauenit |
| Eläolithsyenit m min. | eleolite syenite neoheline syenite |
| Nephelinsyenit m min. | nepheline syenite elaeolite syenite |
syenite Definition:
- 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.
| Syenite (n.) Orig., a rock composed of quartz, hornblende, and feldspar, anciently quarried at Syene, in Upper Egypt, and now called granite. |
| Syenite (n.) A granular, crystalline, ingeous rock composed of orthoclase and hornblende, the latter often replaced or accompanied by pyroxene or mica. Syenite sometimes contains nephelite (elaeolite) or leucite, and is then called nephelite (elaeolite) syenite or leucite syenite. |