<P> Siliceous ooze is a siliceous pelagic sediment that covers large areas of the deep ocean floor . Siliceous oozes consist predominantly of the remains of microscopic sea creatures, mostly those of diatoms and radiolarians . Sometimes siliceous oozes also contain silicoflagellates and the spicules of sponges . </P> <Ul> <Li> Diatoms are golden - brown algae that construct an opaline silica microscopic shell that is known as a "frustule". </Li> <Li> Silicoflagellates are a minor group of marine algae that construct microscopic shells composed of opaline silica . </Li> <Li> Radiolarians are marine protists that also construct microscopic shells composed of opaline silica and are distant relatives of the foraminifera . </Li> </Ul>

Where in the oceans are siliceous oozes typically found