This kind of strata is distributed widely in the Quaternary overburden layer of mountain riverbeds and mountain sloping field.
这类地层广泛存在于山区河床，山前坡地等第四系覆盖层中。
Quaternary overburden is completely developed with thick layer.
第四系松散堆积层发育完全，厚度大。
Quaternary overburden is completely developed with thick layer.
第四系松散堆积层发育完全，厚度大。
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