A pelagic mud consisting of the calcareous or siliceous remains of pelagic organisms (e.g. coccoliths, and tests of foraminiferids and diatoms (Bacillariophyceae)), and hemipelagic clay minerals. Calcareous oozes will accumulate in the deep oceans at depths shallower than the carbonate compensation depth (CCD). See also globigerina ooze; diatom ooze; pteropod ooze; radiolarian ooze.