凝灰岩(tuff):是一种火山碎屑岩,其组成的火山碎屑物质有50%以上的颗粒直径小于2毫米,成分主要是火山灰,外貌疏松粗糙或致密,有层理的称为层凝灰岩;因成分不同导致颜色多样,有紫红色、灰白色、灰绿色等。
...tweights: These are aggregates prepared by processing natural materials such as pumice(浮石)、volcanic tuff(凝灰岩)、volcanic cinder(火山渣),and similar.
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熔结凝灰岩 [岩] welded tuff ; [岩] ignimbrite ; [岩] flood tuff ; weld tuffs
火山凝灰岩 volcanic tuff ; cinerite ; ash tuff ; ash rock
粗粒凝灰岩 coarse ash tuff ; coarse tuff ; co tuff
浮石凝灰岩 pumice tuff ; trass ; pumice e tuff
石质凝灰岩 [岩] lithic tuff ; lithic c tuff
敛凝灰岩 wilsonite
玻璃凝灰岩 [岩] vitric tuff ; vitrictuff
辉绿凝灰岩 [岩] schalstein
安山凝灰岩 andesitic tuff ; [岩] andesite-tuff
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