Definition of "sedimentary rock" []

• One of the major groups of rock that makes up the crust of the Earth; formed by the deposition of either the weathered remains of other rocks, the results of biological activity, or precipitation from solution (noun)

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• "This igneous layer is overlain by a superficial layer of sedimentary rock and mud."
• "Recognizably similar layers of sedimentary rock occur all over the world."