List and describe the four types of marine sediments
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The four types of marine sediments are: biogenous, hydrogenous, lithogenous, and cosmogenous sediments. Biogenous sediments are sediments comprised of the remains of living organisms and may be calcareous, made of the remains of organisms with calcium carbonate shells or test, or siliceous, made of the remains of organisms with silica in their cell walls or tests. Hydrogenous sediments are made from chemical precipitants that settle on the ocean bottom. Lithogenous sediments are derived from continental rock fragments. Cosmogenous sediments are sediments made of tektites, fragments of meteorites that were transported to ocean bottom.
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