Loam is a soil with roughly equal proportions of clay, sand and silt.

壤土是由大约等份的黏土、沙和粉砂合成的。

《牛津词典》

Second, as you know, sand dunes contain other types of particles, besides sand, including clay and silt.

第二，正如你所知，除了沙粒，沙丘还含有其他类型的颗粒，包括粘土和淤泥。

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Deposits sit on top of the earth, and they're composed of clay, sand and a dense form of petroleum that clumps like sod and crumbles.

这些沉积物位于地表，主要是由泥土、砂砾和一种粘稠的石油构成，这些石油板结成块，看起来就像土块和石屑。

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The soil should be full of loam, a mixture of sand, silt,clay and organic material.

VOA: special.2009.04.07

However, it wants to use it for tipping away "inert" clay and sand from building sites instead.

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We also dig out some 110 mcm of gravel, sand, aggregates and clay.

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Most dirt composition is high in either clay or sand.

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