ALL meanings of sapropel
sap·ro·pel
S s - noun sapropel mud consisting chiefly of decomposed organic matter formed at the bottom of a stagnant sea or lake. 1
- noun sapropel an unconsolidated sludge consisting of the decomposed remains of aquatic organisms, esp algae, that accumulates at the bottoms of lakes and oceans 0
- noun sapropel black, decaying, organic bottom deposits in some lakes, rivers, etc. that lack oxygen and are rich in hydrogen sulfide 0