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Siliceous rock
Sedimentary rocks that have silica (SiO2) as the principal constituent From Wikipedia, the free encyclopedia
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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.[1]
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