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单词 sedimentary structure
释义 sedimentary structure
[¦sed·ǝ¦men·trē `strǝk·chǝr]
GEOLOGY
A structure in sedimentary rocks, such as cross-bedding, ripple marks, and sandstone dikes, produced either contemporaneously with deposition (primary sedimentary structures) or shortly after deposition (secondary sedimentary structures).
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