楔形断面
Such infarctions tend to be based on the pleural surface and be roughly wedge-shaped section.
它以胸膜表面为基底,切面大致呈楔形.
High angle tabular cross bedding and low angle wedge cross bedding are generally found on the cross section of the dunes.
沙丘内部发育有高角度板状交错层理、低角度楔状交错层理等层理构造。
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