accessory mineral
The act of one who sojourns; a short stay or residence.
plural of gammation
(mineralogy) any mineral that is present in small amounts in a rock, but is not considered to be characteristic of the rock
plural of Finer
地質学者は花崗岩中に小さな随伴鉱物を確認し、それが岩石の形成過程についての手がかりを与えた。
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