然后一些很奇怪的事儿发生了：梯田里的黄土不再在碎岩石上-在非常完美层压的黏土丰富的沉积物上。
Then something strange happened: the loess in the terraces wasn't on top of crushed rock anymore - it was on top of very finely laminated clay-rich sediments.
结果表明，养殖区和对照区沉积物类型均是黏土质粉砂，没有明显差异；
The results showed that the sediment both in cage fish farming and control area belonged to clay-silt type, and no differences were observed.
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