deep marine sediment https://en.wikipedia.org/wiki/Marine_sediment envoPolar EcoLexicon:marine_sediment EcoLexicon:marine_sedimentation Sediment that accumulates in the flat or very gently sloping areas of the deep ocean basin floor. The three main types of deep marine sediment, also known as pelagic sediment, are siliceous oozes, calcareous oozes, and red clays. SWEETRealm:MarineSediment deep marine sediments marine sediment