Graywacke

graywacke

[′grā‚wak·ə] (petrology) An argillaceous sandstone characterized by an abundance of unstable mineral and rock fragments and a fine-grained clay matrix binding the larger, sand-size detrital fragments.

Graywacke

a rock of sedimentary origin consisting of small fragments (grains) of sedimentary and chiefly metamorphic and igneous rock with an admixture of fragments of basic volcanic rock and tufogenic material. A significant quantity of cementing material is characteristic. The color is usually dark gray, black, or dark green (owing to the chlorite in the cement). The fragmentary grains in the graywacke are angular or slightly rounded and are poorly sorted. Graywackes are typical for geosynclinal areas where they form thick strata originating during periods of the rapid accumulation of disintegration products from internal uplifts composed of more ancient rock.

单词	graywacke
释义	graywacke gray·wacke G0245200 (grā′wăk′, -wăk′ə)n. Any of various dark gray sandstones that contain shale. [Partial translation of German Grauwacke : grau, gray + Wacke, rock (from Middle High German, from Old High German waggo, boulder; see wegh- in Indo-European roots).] Graywacke graywacke [′grā‚wak·ə] (petrology) An argillaceous sandstone characterized by an abundance of unstable mineral and rock fragments and a fine-grained clay matrix binding the larger, sand-size detrital fragments. Graywacke a rock of sedimentary origin consisting of small fragments (grains) of sedimentary and chiefly metamorphic and igneous rock with an admixture of fragments of basic volcanic rock and tufogenic material. A significant quantity of cementing material is characteristic. The color is usually dark gray, black, or dark green (owing to the chlorite in the cement). The fragmentary grains in the graywacke are angular or slightly rounded and are poorly sorted. Graywackes are typical for geosynclinal areas where they form thick strata originating during periods of the rapid accumulation of disintegration products from internal uplifts composed of more ancient rock. AcronymsSeeGRCK
随便看	there are plenty/lots more fish in the sea there are plenty more fish in the sea there are plenty more pebbles on the beach unsaturated polyester unsaturated polyester resin unsaturated solution unsaturated standard cell unsaturated zone unsaturated zone monitoring unsaturation unsaturations unsaved unsavedly unsavorily unsavoriness unsavory unsavourily unsavouriness unsavoury unsawn unsay unsayable unsaying unsays unsbl

graywacke

gray·wacke

Graywacke

graywacke

Graywacke