凝灰岩 [岩] tuff ; volcanic tuff ; ashstone
熔结凝灰岩 [岩] welded tuff ; [岩] ignimbrite ; weld tuffs
火山凝灰岩 volcanic tuff ; cinerite ; ash tuff ; ash rock
凝灰火山锥 [地质] ash cone
粗粒凝灰岩 coarse ash tuff ; coarse tuff
浮石凝灰岩 pumice tuff
石质凝灰岩 [岩] lithic tuff
凝灰质的 [岩] tuffaceous
玻璃凝灰岩 [岩] vitric tuff
凝灰角砾岩 tuff breccia
向熔岩过渡的火山碎屑岩主要为角砾熔岩和凝灰熔岩等。
The pyroclastic rocks which transit to lava mainly have breccia lava and tuff lava etc.
包古图组主要为一套深海—半深海相的灰、灰黑色薄层状凝灰质粉砂岩、凝灰质泥岩，与灰绿色、灰色薄层状沉凝灰岩不均匀互层。
Bao ancient group plans for a major deep-sea - a half deep in the ash, black ash-like TLC tuffaceous siltstone, shale tuffaceous, with gray green, with thin gray-tuff interbedded uneven.
由于凝硬作用的影响，粉煤灰的工程性质可能随时间增长而改善，浸水可能不致于使灰的性能恶化；
Requirements for the filters to protect fly ash slurry are higher than those in compacted soils; The engineering properties of fly ash are getting better with time because of the pozzolanic action.
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