1. SyeniteSyenite is a coarse-grained intrusive igneous rock of the same general composition as granite but with the quartz either absent or present in relatively small amounts (<5%). The feldspar component of syenite is predominantly alkaline in character . Plagioclase feldspars may be present in small quantities, less than 10%. When present, ferromagnesian minerals are usually hornblende amphibole, rarely pyroxene or biotite.
Read “Syenite” on English Wikipedia
Read “閃長岩” on Japanese Wikipedia
Read “Syenite” on DBpedia
Read “Syenite” on English Wikipedia
Read “閃長岩” on Japanese Wikipedia
Read “Syenite” on DBpedia
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