deep marine sediment
EcoLexicon:marine_sediment
ENVO
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.
deep marine sediments
https://en.wikipedia.org/wiki/Marine_sediment
ENVO:00002113
envoPolar
EcoLexicon:marine_sedimentation
SWEETRealm:MarineSediment
pelagic sediment {alternative name}
marine sediment