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Contents of 5.5 How are sedimentary rocks classified?

5.5 How are sedimentary rocks classified?

• Origin, texture, and composition of sediment grains are used to classify sedimentary rocks
• Clastic rock names rely first on grain size, and then on rounding, sorting, etc.
• Clastic sediment composition reveals the rock from which a sediment derives, as well as the amount of weathering.
• Chemical/biogenic sedimentary rocks consist of precipitated minerals from either biological or inorganic processes, or both.