Siliceous rock

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]

References

  1. ↑ Schumann, Walter (1993). Handbook of Rocks, Minerals, and Gemstones. Houghton Mifflin Harcourt. ISBN 978-0395511374. Retrieved 2013-11-20.