英语词汇“siliceous sediment”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	siliceous sediment
释义	siliceous sediment siliceous sediment [sə′lish·əs ′sed·ə·mənt] (geology) Fine-grained sediment and sedimentary rock mainly composed of the microscopic remains of the unicellular, silica-secreting plankton diatoms and radiolarians. Minor constituents include extremely small shards of sponge spicules and other microorganisms such as silicoflagellates. Siliceous sedimentary rock sequences are often highly porous and can form excellent petroleum source and reservoir rocks.
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