clastic mineral
81quartzite — quartzitic /kwawrt sit ik/, adj. /kwawrt suyt/, n. a granular metamorphic rock consisting essentially of quartz in interlocking grains. [1840 50; QUARTZ + ITE1] * * * Sandstone that has been converted into a solid quartz rock. Quartzites are… …
82Ziad Rafiq Beydoun — Born 1925 Beirut Died …
83Chert (Gestein) — Cherts (dunkle Lagen) im devonischen Corriganville New Creek Kalkstein, Everett, Pennsylvania Cherts (im Deutschen oft unter dem Namen Hornstein) sind sedimentär und diagenetisch entstandene Kieselgesteine …
84breccia — A coarse grained, clastic rock composed of angular rock fragments (larger than 2 mm) commonly bonded by a mineral cement in a finer grained matrix of varying composition and origin. The consolidated equivalent of rubble. Compare:… …
85detritus — [ geology ] A collective term for rock and mineral fragments occurring in sediments, that are detached or removed by mechanical means (e.g., disintegration, abrasion) and derived from pre existing rocks and moved from their place of origin …
86Breccia — A coarse grained clastic rock, composed of angular broken rock fragments held together by a mineral cement or in a fine grained matrix. U.S. Dept. of Energy, Energy Information Administration s Energy Glossary …
87euclase — [yo͞o′klās΄] n. [Fr < eu (see EU ) + Gr klasis, a breaking < klan, to break (see CLASTIC): so named from breaking easily] a very hard, brittle, monoclinic mineral, hydrous beryllium aluminum silicate, BeAlSiO4 (OH), sometimes used as a gem …
