cherty flint

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• Chert — For the Spanish municipality, see Xert. Chert Chert (  / …   Wikipedia

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• sedimentary rock — Rock formed at or near the Earth s surface by the accumulation and lithification of fragments of preexisting rocks or by precipitation from solution at normal surface temperatures. Sedimentary rocks can be formed only where sediments are… …   Universalium

• chert — noun Etymology: origin unknown Date: 1679 a rock resembling flint and consisting essentially of a large amount of fibrous chalcedony with smaller amounts of cryptocrystalline quartz and amorphous silica • cherty adjective …   New Collegiate Dictionary

• Basanite — (pronEng|ˈbæsənaɪt) is an igneous, volcanic (extrusive) rock with aphanitic to porphyritic texture. The mineral assembly is usually abundant feldspathoids (nepheline or leucite), plagioclase, and augite, together with olivine and lesser iron… …   Wikipedia

• chert — [chʉrt] n. [< ?] an extremely dense type of quartz, including jasper and flint, having a dull, opaque luster and made up of microscopic crystals cherty [chʉrtē] adj. chertier, chertiest …   English World dictionary

• malmstone — ˈ ̷ ̷ˌ ̷ ̷ noun or malm rock Etymology: malm (I) 1. dialect chiefly England : malm 2. dialect England : a cherty rock similar to flint used in building and paving …   Useful english dictionary