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Siliceous rocks are sedimentary rocks that have silica (SiO2) as the principal constituent. The most common siliceous rock is Chert other types include Diatomite. They commonly form from silica-secreting organisms such as radiolarians, diatoms, or some types of sponges.
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Siliceous_rock". A list of authors is available in Wikipedia.|