silt的英语例句
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The presence of fragments of silicified siltstone retains their original bedding.
硅化粉的砂岩碎块保留有原始层面.
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The channel is overlain by siltstone and lenticular beds of limestone.
河道上面覆盖着粉砂岩和石灰岩透晶体.
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The main rocks are sandstone, mudstone and muddy siltstone or silty mudstone.
岩石类型主要有砂岩 、 泥岩及泥-粉砂过渡岩类.
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