adj.安山巖的

The volcanics are most commonly andesitic in composition. 火山巖的組成最通常是安山巖。

The ore-bearing rock is composed mainly of andesitic tuff and tuffite. 作者在賦礦層中首次發(fā)現(xiàn)了層狀電氣石巖。

A detailed petro-logical study indicates that most of the zigzag clasts were generated by in-situ quench fragmentation of andesitic magma. 研究表明，該熔積巖的角礫為巖漿遇水后快速淬火、裂解的產(chǎn)物，鐵硅質(zhì)組合為海底噴氣沉積形成的含鐵建造；

This area consists of cataclastic andesitic tuff, altered volcanic rock, slightly altered and cataclastic anisomerous sandstone, slump breccia, and silt bearing cataclastic tuffaceous shale. 其主要由一套碎裂安山凝灰?guī)r、蝕變火山巖、輕微蝕變碎裂不等粒砂巖、坍塌角礫巖、含粉砂碎裂凝灰質(zhì)泥巖等組成。

1. The volcanics are most commonly andesitic in composition. 火山巖的組成最通常是安山巖。