Triassic volcanics.
三叠世火山岩
Shoshonitic volcanics
橄榄安粗质火山岩
The volcanics are most commonly andesitic in composition.
火山岩得组成最通常是安山岩。
Study of Characterizations of Favourable Carboniferous Volcanics Reservoir in Shixi Oilfield
石西油田石炭系火山岩油藏有利储层特征研究
King George Island consists mainly of Tertiary volcanics which contain plentiful plagioclases.
乔治王岛第三纪火山岩含大量斜长石斑晶。
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