chert and flint: Quick Facts

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(Left) Chert from Pelham, Mass., (right) flint from Sussex and Suffolk

banded-iron formation (BIF)

noncarbonate, nonclastic sedimentary rocks

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Topics

bedded chert diatomite nodular chert porcellanite novaculite radiolarian earth diatomaceous earth tripoli flint quartz jasper amethyst rock crystal lechatelierite citrine smoky quartz chalcedony rose quartz Venus’s-hairstone hawk’s-eye

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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