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Sediment Historical Record. Ocean Sediments are the accumulation of innumerable solid particles of many different types of materials that sink through the water column and are deposited on the seafloorparticles range in size from 0.001 mm to 10 cmSediments cover all of the world ocean's seafloor except where fast currents have swept them awayAccumulation rates vary, with most in the 1mm/1000 yrs to 1m/yr range.
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