chalcedonic

常見例句

• A siliceous rock of chalcedonic or opaline silica occurring in limestone.
  硅石出現(xiàn)在灰?guī)r中的玉髓或蛋白色硅石
• This rock contained chalcedonic cement before it underwent diagenesis, a process where low temperatures and low pressures alter the content of sediments before they finally lithify, or turn into rock.
  在它經(jīng)歷成巖作用之前，它含有燧石質(zhì)的膠結(jié)成分。成巖作用過程中，低溫抵壓改變了沉積物的成分，而后固結(jié)成巖。
• a siliceous rock of chalcedonic or opaline silica occurring in limestone
  出現(xiàn)在灰?guī)r中的玉髓或蛋白色硅石
• chalcedonic chert
  玉髓狀燧石
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