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Earth science 14.3


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Earth science 14.3

  1. 1. Seafloor Sediments 14.3
  2. 2. Terrigenous Sediment • Seafloor sediment derived from eroded rocks on land.
  3. 3. Biogenous Sediment • Seafloor sediment of biological origin, such as shells and skeletons of marine life.
  4. 4. Calcareous Ooze • Thick, common biogenous sediment produced by dissolving calcium carbonate shells.
  5. 5. Siliceous Ooze • Biogenous sediment composed of the silica- based shells of single-celled animals and algae.
  6. 6. Hydrogenous Sediment • Seafloor sediment consisting of minerals that crystallize from seawater.
  7. 7. Key Concept • What are the three types of the ocean-floor sediments? –The three types are terrigenous sediments, biogenous sediments and hydrogenous sediments.
  8. 8. Key Concept • What does terrigenous sediment consist of? –Terrigenous sediments consist primarily of mineral grains that were eroded from continental rocks and transported to the ocean.
  9. 9. Key Concept • What is the composition of biogenous sediment? –Biogenous sediments consist of shells and skeletons of marine animals and algea.
  10. 10. Key Concept • How is hydrogenous sediment formed? –Hydrogenous sediment consists of minerals that crystallize directly from ocean water through various chemical reactions.