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Definition of chert in English: chertnoun tʃəːttʃɛrt mass nounA hard, dark, opaque rock composed of silica (chalcedony) with an amorphous or microscopically fine-grained texture. It occurs as nodules (flint) or, less often, in massive beds. Example sentencesExamples - Crystals of brown sphalerite are found in fractures and on the surfaces of some chert nodules.
- The sedimentary lenses are composed of limestone, sandstone, siltstone, mudstone, shale, chert and well-bedded calci-turbidite.
- The deposits immediately above the maximum flooding surface are thinly interbedded ammonoid-bearing cherts and lime mudstones.
- The volcano-sedimentary sequence is characterized by lava flows alternating with grey shales and occasional red chert bands.
- In fact, seventeen of the fifty-seven sites are specifically listed for agate, chalcedony, chert, jasper, or petrified wood.
- It comprises turbiditic elastic rocks with cherts, pillow lavas and greenstones.
Derivatives adjective These fracture zones occur as parallel layers alternating with cherty lithons, typically 5 mm wide, giving the rock a banded appearance. Example sentencesExamples - The cherty carbonate rocks are resistant to weathering, and regions underlain by them may stand above the surrounding terrain.
- The underlying soils are acidic, cherty, infertile, and permeable to water.
- Nevertheless, many tectonic ironstones are rather massive, cherty rocks, suggesting that early structural fabrics were annihilated by late-stage chert replacement.
- The material was obtained from a cherty layer of sedimentary interbeds and is included in the Kirkpatrick Formation.
Origin Late 17th century (originally dialect): of unknown origin. Rhymes advert, alert, animadvert, assert, avert, Bert, blurt, Burt, cert, concert, controvert, convert, curt, desert, dessert, dirt, divert, exert, flirt, girt, hurt, inert, insert, introvert, Kurt, malapert, overt, pert, quirt, shirt, skirt, spirt, spurt, squirt, Sturt, subvert, vert, wort, yurt Definition of chert in US English: chertnounCHerttʃɛrt A hard, dark, opaque rock composed of silica (chalcedony) with an amorphous or microscopically fine-grained texture. It occurs as nodules (flint) or, less often, in massive beds. Example sentencesExamples - The deposits immediately above the maximum flooding surface are thinly interbedded ammonoid-bearing cherts and lime mudstones.
- Crystals of brown sphalerite are found in fractures and on the surfaces of some chert nodules.
- It comprises turbiditic elastic rocks with cherts, pillow lavas and greenstones.
- The volcano-sedimentary sequence is characterized by lava flows alternating with grey shales and occasional red chert bands.
- The sedimentary lenses are composed of limestone, sandstone, siltstone, mudstone, shale, chert and well-bedded calci-turbidite.
- In fact, seventeen of the fifty-seven sites are specifically listed for agate, chalcedony, chert, jasper, or petrified wood.
Origin Late 17th century (originally dialect): of unknown origin. |