Microscopic organisms settle to the seafloor and accumulate in marine mud.

微生物在海底定居并在海泥中积聚。

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Much of the seabed is covered by Marine mud with some scattered sand Banks.

大部分海床都为海泥和零散的沙洲所覆盖。

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The fossils were preserved in rocks formed by layers of ancient Marine mud in south-eastern Morocco.

这些化石都保存在由古代东南部摩洛哥海泥层形成的岩石。

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Emergency personnel gathered in New York Friday alongside the canal, which borders Brooklyn's Red Hook neighborhood, in an effort to rescue the marine mammal, which inadvertently had become trapped in the channel's muck and mud.

CNN: Rescuers: Dolphin stranded in polluted New York canal dies

Marine biologists at Edinburgh's Heriot-Watt University report the cable could cross deep water mud habitats.

BBC: Western Isles sub-sea cable 'could affect' mud life