: 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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Enlarge / Black chert with bands of white chert formed in low-energy environment prior to S2 impact.
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Alka Tripathy-Lang, Ars Technica, 26 Jan. 2024
Still, the microorganisms Schopf discovered in the chert in Western Australia may not be the oldest fossil evidence of life on the planet.
—Joshua Rapp Learn, Discover Magazine, 14 Jan. 2022
This ratio revealed that the shapes preserved in the chert were characteristic of biological matter.
—Joshua Rapp Learn, Discover Magazine, 14 Jan. 2022
Most of the tools and arrows the researchers examined were made of chert, a sedimentary rock.
—Mark Barna, Discover Magazine, 20 June 2018
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Alka Tripathy-Lang, Ars Technica, 26 Jan. 2024
Still, the microorganisms Schopf discovered in the chert in Western Australia may not be the oldest fossil evidence of life on the planet.
—Joshua Rapp Learn, Discover Magazine, 14 Jan. 2022
This ratio revealed that the shapes preserved in the chert were characteristic of biological matter.
—Joshua Rapp Learn, Discover Magazine, 14 Jan. 2022
Most of the tools and arrows the researchers examined were made of chert, a sedimentary rock.
—Mark Barna, Discover Magazine, 20 June 2018
See All Example Sentences for chert
Cite this Entry
“Chert.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/chert. Accessed 5 Jul. 2025.
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