成分相当于正长岩,与相当于闪长岩的安山岩同属于中性火山喷出岩。其基质为隐晶质,呈浅灰、浅黄或粉红色,有气孔或多孔的熔渣构造。粗面岩分布不广,常与其它喷出岩如流纹岩、安山岩等伴生。
还有不少岩石是以岩石的特征命名,如Trachyte(粗面岩)原是粗糙的意思因为岩石有粗糙的质感岩),原是粗糙的意思,因为岩石有粗糙的质感;有些岩石是以首先发现的地点来命名,如Andesi...
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经岩石力学分析,玄武岩抗压强度最大,粗面岩抗压强度相对较弱。
Through rock mechanics analysis, basalt has the most compression strength, while that of trachyte is relatively weaker.
火山岩主要岩石类型为粗安岩,少量粗面岩、玄武粗安岩、白榴石玄武粗安岩;
The main rock type of the volcanic rock is trachyandesite with small amounts of trachyte, basaltic-trachyandesite and leucite basaltic-trachyandesite.
欧利坨子地区沙三下亚段火山岩类型以火山碎屑岩为主,次为玄武岩及粗面岩。
The volcanic rocks of the Lower Es3 in Oulituozi region are mainly volcaniclastic rock, basalt and trachyte.
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