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逆行沙丘交错层理

名词解释题
2022-01-05 18:49
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正确答案

它是由逆行沙丘迁移产生的倾斜纹层组成的交错单元。其内部纹层通常十分模糊,倾角一般小于10°。它们的倾向取决于逆行沙丘是逆流迁移还是顺流迁移。逆行沙丘交错层理通常只出现在水浅流急上部水流机制的环境中,如海滩、湖滨以及河流的天然堤和曲流沙坝中。


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逆行沙丘交错层理
板状交错层理
槽状交错层理
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