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  • Sapropel (a contraction of ancient Greek words sapros and pelos, meaning putrefaction and mud, respectively) is a term used in marine geology to describe dark-coloured sediments that are rich in organic matter. Most studies of sapropel formation mechanisms infer some degree of reduced deep-water. — “Sapropel - Wikipedia, the free encyclopedia”,
  • Sapropel is part of WikiProject Geology, an attempt at creating a standardized, informative, comprehensive and easy-to-use geology resource. If you would like to participate, you can choose to edit this article, or visit the project page for more information. Stub. — “Talk:Sapropel - Wikipedia, the free encyclopedia”,
  • The biggest deposits of commercial potential are near Aleksinac and Vina-Zubetin.[1] Serbian oil shale is of sapropel type (Aleksinac, Mionica and Petnica) and sapropel-coaly type.[1] [edit] History of exploration. Although oil shale was known. — “Oil shale in Serbia - Wikipedia, the free encyclopedia”,

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