Bathyal depositions

BATHYAL DEPOSITIONS (EN: bathyal deposits; DE: bathyale Ablagerungen; FR: depots bathyaux; ES: depysitos batiales; RU: батиальные отложения) are the oceanic and marine sediments, which are depositing themselves on the mainland slope between the neritic and abyssal zones within the interval of the depths of 200-2500 metres. They occupy approximately 20% of the area of the world ocean. There prevail among the bathyal depositions the terrigenous sediments (more than 56%), which are emerging as the result of the transfer of the clastic material and clayish particles from the dry land. There follow further the calcareous oozes (approximately 30%), among which there are approximately equally distributed the foraminiferal, corally, and shelly (coquina) sediments, and also the siliceous oozes (approximately 8% of the area of the mainland slope), which are represented mainly by the diatomic, less often by the radiolarian sediments. The volcanogenic sediments (5%) are confined to the provinces of the modern volcanic activity. The analogues of the bathyal depositions are known among the sedimentary strata of the flysch, with which there are associated the reservoirs of petroleum and mineral waters.