"Fine sediment" refers to tiny particles of dust, sand, or other solid material that are so small that they can easily be moved or carried by water or air. Full definition
If the lake were thousands of years old, it would probably have a flat bottom, the result of fine sediments gradually filling it up. (scientificamerican.com)
But active management to reduce invasive algae and limit fine sediments could allow coral recovery in Maunalua Bay.» (sciencedaily.com)
Over time, fine sediments such as silt or sand are picked up and deposited, building dunes or scouring rock bare. (discovermagazine.com)