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cherty texture

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 — For the Spanish municipality, see Xert. Chert Chert ( / … Wikipedia
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 — [tʃə:t] noun a hard, dark, opaque rock composed of silica (chalcedony) with an amorphous or microscopically fine grained texture. Derivatives cherty adjective Origin C17 (orig. dialect): of unknown origin … English new terms dictionary