The type of sediment that is made up mainly of the shells of diatoms and radiolarians are called the siliceous ooze<span>. Siliceous ooze is a siliceous pelagic sediment that covers large areas of the deep ocean floor. Calcareous ooze, siliceous ooze is formed from the tests of microorganisms; in the case of siliceous ooze, the organisms come in two varieties, diatoms and radiolarians. </span>
This is the North Atlantic Ocean.
It can be judged by its surrounding, as it is located near the North Pole, we can deduce that it is an ocean located at the north, which could either be north Atlantic or North Pacific.
We can then use the continential plate to help us determine, which is the North America plate.
Therefore this is the North Atlantic Ocean.
Hope it helps!
