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chert and flint
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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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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
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Photos

(Left) Chert from Pelham, Mass., (right) flint from Sussex and Suffolk
banded-iron formation (BIF)
noncarbonate, nonclastic sedimentary rocks
See All Images →

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Related Quizzes and Features

Quiz
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