Many sedimentary rocks contain clay minerals and 76% of forming-rock minerals of slope rocks can produce clay minerals during the weathering processes.
除沉积岩斜坡含粘土矿物外，76%以上的斜坡岩石造岩矿物还可形成次生粘土矿物。
Because soft rocks have low strength and high porosity and contain large amount of expansive clay minerals, the freezing-thawing process of soft rock is complicated.
由于软岩为强度低、孔隙度大、胶结程度差、含有大量膨胀性粘土矿物的松散、软弱岩层。
No soil is pure clay, silt, sand or gravel, but a soil may contain a large amount of one of these.
没有什么土壤是单纯的粘粒、粉粒、砂粒和砾石。只不过是某种土粒为主而已。
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