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Definition of chert
: a rock resembling flint and consisting essentially of a large amount of fibrous chalcedony with smaller amounts of cryptocrystalline quartz and amorphous silica
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Recent Examples of chert from the Web
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For instance, the Mars 2020 fossil hunters will look for chert and silica—two types of minerals that, on Earth, are ideal for entombing and preserving biological material.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'chert'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
Origin and Etymology of chert
origin unknown
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See words that rhyme with chert Britannica.com: Encyclopedia article about chert
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