We found one dictionary that defines the word sapropel-clay:

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1. sapropel-clay: Encyclopedia

▸ Words similar to sapropel-clay ▸ Usage examples for sapropel-clay ▸ Idioms related to sapropel-clay ▸ Wikipedia articles (New!) ▸ Words that often appear near sapropel-clay ▸ Rhymes of sapropel-clay ▸ Invented words related to sapropel-clay