Slimy mixtre of water and fine particles of solid material, ranging in texture from liquid to soft solid. The term is used in three ways. Firstly, it describes a sediment made up of clay, slit and water, such as that found where a lake has been drained to leave its bottom sediments exposed. Secondly, the sticky muds of the sea floor are described by their colour- blue, black, grey, green or red. A third use of the term is to describe the mixture of water and chemicals used when drilling a borehole, as in oil wells.
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