sedimentary ash 沈积火山灰
sedimentary fly ash 沉积粉煤灰
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The analysis of volcanic petrology indicates that the volcanic lithofacies can be divided into volcanic breccia, lava, ash and sedimentary ones.
通过对火山岩岩石学特征分析，将火山岩岩相划分为火山角砾岩柑、火山熔岩相、火山灰相和火山沉积相。
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