Interbedded with the salt were thin layers of what appeared to be windblown silt.

Interbedded with the salt were thin layers of what appeared to be windblown silt.

Thin layers of what appeared to be windblown silt were interbedded with the salt.
与结晶盐层夹杂在一起的是被风吹起的泥沙薄层。

原句是一个表系主结构的句子。主系表结构的句子，充当表语的是分词短语时，通常要表达为表系主结构的句子。
e.g.
Hanging on the wall is a nice picture.
Tied to the tree is a poor monkey.

典型的倒装句，如果salt为主语be动词就不会是were而是was。
主语是thin layers所以用were，全部的主语是thin layers of what appered to be windblown silt.由于太长了，谓语是interbedded with,宾语是salt。头重脚轻所以倒装。

可以追问为什么可以，可以说下是什么成分吗

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