Syenite
Deep igneous rocks made of alkali feldspar and acidic / intermediate plagioclase, the most common minor constituents are hornblende, biotite, muscovite and accessory are zircon, apatite, sfen; volcanic equivalent: trachyte.
Deep igneous rocks made of alkali feldspar and acidic / intermediate plagioclase, the most common minor constituents are hornblende, biotite, muscovite and accessory are zircon, apatite, sfen; volcanic equivalent: trachyte.
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