siltstones

siltstones

美 　英

• 网络粉沙岩

例句

The graptolites are generally preserved as films in mudstones or muddy siltstones at the depths of thousands meters beneath the surface.

这些笔石标本一般保存成薄膜状于数千米之下的泥岩或泥质粉砂岩之中。