Аннотация:The structure and composition of diatomaceous sediments are studied in Late Quaternary sec-tions in the Danube deep-sea fan area on the northwestern continental slope of the Black sea. The neoeuxinian diatom ooze occurs throughout the area studied. The Old and Recent Black Sea diatom oozes are pertained to submarine valleys. We have distinguished the follow-ing three genetic types of diatomaceous sediments: normal deposition (background), avalanche deposition, and turbidites.