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Construction for Landscape Architecture by Jamie Liversedge, Robert Holden

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Sedimentary rocks

These may be either particles of older rocks broken down by natural forces such as frost action, or wind or wave erosion—or depositions of organic origin such as vegetable matter and bacteria, shells and coral formation, or precipitation of organically formed calcareous matter. They are rocks that have been laid down or deposited and the word "sedimentary" comes from the Latin sedimentum meaning "to settle" or "sink down." Typically, they may be thought of as solidified sandy beaches and sand dunes or coral reefs. Sedimentary rocks account for the majority of building stone because they are very common, forming up to 75 per cent of the earth’s surface, and are characterized by:

  • the natural grain showing as a consequence of ...

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