siliceous rock: Quick Facts

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Two examples of siliceous rock: chert (left), and flint.

noncarbonate, nonclastic sedimentary rocks

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chert and flint bedded chert nodular chert diatomite porcellanite novaculite diatomaceous earth radiolarian earth tripoli chemical rock coal phosphorite evaporite banded-iron formation carbonate rock geode oölite nodule pisolite

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sedimentary rock: Siliceous rocks

Basalt sample returned by Apollo 15, from near a long sinous lunar valley called Hadley Rille. Measured at 3.3 years old.

(Bed) Rocks and (Flint) Stones