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  • Understanding Marine Sediments: Types, Formation & Composition
    Here are three different types of marine sediments:

    1. Biogenic Sediments: These sediments are formed from the remains of organisms.

    * Calcareous ooze: Made up of the shells and skeletons of marine organisms like foraminifera, coccolithophores, and pteropods.

    * Siliceous ooze: Composed of the remains of diatoms and radiolarians, both types of single-celled algae with silica-based shells.

    2. Terrigenous Sediments: These sediments originate from land and are transported to the ocean by rivers, wind, glaciers, and gravity.

    * Clay: Fine-grained sediment, often transported by rivers and deposited in deep ocean basins.

    * Sand: Larger-grained sediment, often deposited on continental shelves and beaches.

    3. Hydrogenous Sediments: These sediments are formed by chemical processes within the ocean.

    * Manganese nodules: Nodules of manganese, iron, and other metals that form on the seafloor.

    * Evaporites: Minerals precipitated from seawater as it evaporates, such as halite (rock salt) and gypsum.

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