The type of ocean floor sediment that is biological in origin is biogenic sediment.

Here's a breakdown:

* Biogenic sediment is made up of the hard parts of marine organisms, like:

* Calcareous ooze: Composed mainly of the calcium carbonate shells of foraminifera, coccolithophores, and pteropods.

* Siliceous ooze: Composed mainly of the silica shells of diatoms and radiolarians.

* Organic ooze: Made up of the remains of soft-bodied organisms like plankton.

Let me know if you'd like more information on any of these!