Word of the day

Sapropel – an unconsolidated sludge consisting of the decomposed remains of aquatic organisms, esp algae, that accumulates at the bottoms of lakes and oceans; black, decaying, organic bottom deposits in some lakes, rivers, etc. that lack oxygen and are rich in hydrogen sulfide;  dark-coloured sediments that are rich in organic matter; a slimy sediment of marine, estuarine, or lacustrine deposition consisting largely of organic debris derived from aquatic plants and animals;

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