What process makes sediment pile up on the ocean floor?

Sediment piles up on the ocean floor primarily through the process of sedimentation, which occurs when particles settle out of water due to gravity. This can happen as a result of erosion from land, where rivers transport sediment to the ocean, or through the accumulation of organic materials and mineral particles that fall from the water column. Additionally, ocean currents can help distribute and deposit sediments in various marine environments, contributing to the formation of sedimentary layers over time.