pegmatite
A coarsely crystalline igneous or plutonic rock composed primarily of feldspar and quartz, normally with muscovite and/or biotite mica.
plural of technosceptic
(geology) of or relating to gneiss
plural of tie wire
地質学者は、長石と石英を主成分とし、通常白雲母などの鱗片鉱物を含む粗粒の深成岩の脈を注意深く採取して、その大きな長石や石英の結晶を分析した。
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