SAPROPELITHO, angishthoi sapropeli, sarvathoi zerizaminii sakhti suzandaro guyand. Sapropelitho dar qari kulu lagunaho az tagyiri boqimondai rastanihoi darajai past va hay- vonhoi soddatarin ba vujud meoyad. Rangash bur, buri khokistartob, si- yoh. Sapropelithoro az rui tanosubi miqdori mikrokomponenthoi sapropeli (algenit) va gumusi (vitrinit, fyuzipit va leyptinit)-i tarkibash ba Sapropelithoi khususi (bogkhed, saprokolit), Sapropelithoi gumiti (kennel, kasyanit) judo mekunand.
Dar Sapropelitho miqdori moddahoi gazmonand (60—90%), zift (50%), gidrogen (7—12%) nisbat ba gumolitho khele ziyod ast. Sapropelitho dar havzahoi angishti nazdi Moskva, Irkutsk (Ittifoqi Respublikahoi Sovetii Sotsialisti Soyuz Sovetskikh Sosialisticheskikh Respublik SSSR), Rur (Respublikai Federativii Germaniya) va gayra mavjud ast. Az Sapropelitho suzishvorii ravgani hosil mekunand.