Chapter 5

Chapter 5 - The most abundant marine sediments are broadly...

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Marine Systems Chapter 5 Chapter 5 Sediments I. Sediment Sediment is particles of organic or inorganic matter that accumulate in a loose, unconsolidated form. II. Classifying Sediments Although boulders, cobbles, and pebbles occur in the ocean, most marine sediments are made of finer particles: sand, silt, and clay. Sediments composed of particles of mostly one size are said to be well-sorted sediments . Sediments with a mixture of sizes are poorly sorted sediments. Terrigenous Sediments Terrigenous Sediments ( terra means “Earth”; generare means “to produce”) are the most abundant. Biogenous Sediments Biogenous Sediments are the next most abundant marine sediment.
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Unformatted text preview: The most abundant marine sediments are broadly classified as terrigenous and biogenous. Terrigenous sediments are geological origin and arise on the continents or islands near them. They are the more abundant. Biogenous sediments are biological origin. Hydrogenous Sediments Hydrogenous Sediments are minerals that have precipitated directly from seawater. Hydrogenous Sediments are also called authigenic sediments because they were formed in the play they now occupy. Cosmogenous Sediments Cosmogenous sediments which are of extraterrestrial origin are the least abundant....
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