Ocean chemistry and deep-sea sediments
Ocean chemistry and deep-sea sediments
Ocean chemistry and deep-sea sediments
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Summary:Deep-<strong>sea</strong> <strong>sediments</strong> are a mixture of biogenic <strong>and</strong> terrigenous <strong>sediments</strong>, withminor volcanogenic <strong>and</strong> extraterrestrial contributions.Submarine topography <strong>and</strong> ocean currents determine their distribution.Pelagic <strong>sediments</strong> are mainly composed of the remains of calcareous <strong>and</strong> siliceous<strong>sediments</strong> with a mixture of eolian <strong>sediments</strong>.Hemipelagic <strong>sediments</strong> such as glaciomarine <strong>sediments</strong> are a mixture ofterrigenous sediment input from nearby continents <strong>and</strong> marine <strong>sediments</strong>.Wind blown dust can travel long distances while river derived sediment settledown on continental margins.Clay mineral compositions can be useful in determining climate zones ortransport pathways.IRD <strong>sediments</strong> help to identify major iceberg transport pathways <strong>and</strong> icesheetcollapse.