最終更新日:2022/12/24
The type of rock that results is often described as trachyte and contains abundant crystals of a different kind of alkali-rich feldspar, such as sanidine, rather than plagioclase.
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The type of rock that results is often described as trachyte and contains abundant crystals of a different kind of alkali-rich feldspar, such as sanidine, rather than plagioclase.