叙述了滕县煤田太原组的沉积特征,分析了主要碎屑矿物的标型特征以及该组砂岩在物质成分、结构及沉积构造等方面与火山碎屑岩的差......

对鲁西地区石炭二叠纪煤系火山碎屑岩特征进行了分析，结果表明，火山碎屑物质以晶屑最为常见，常见的火山碎屑岩有凝灰岩、沉凝灰岩、凝......

Pyroclastics which are known natural pozzolanic materials due to amorphous contents, are present in several areas of the......

The Oligocene Afro-Arabian flood volcanic province contains significant silicic pyroclastic rocks (>60000 km~3 constitut......