At its type section in the Jiyang Depression, the member 4 can be divided into the upper, middle and lower sub-members.

沙四段在其建组剖面分为沙四上、中和下三个亚段。

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At its type section in the Jiyang Depression, the member 4 can be divided into the upper, middle and lower sub-members.

沙四段在其建组剖面分为沙四上、中和下三个亚段。

youdao