Graywacke
Graywacke Gray"wacke`, n. [G. grauwacke; grau gray + wacke wacke. See {Gray}, and {Wacke}, and cf. {Grauwacke}.] (Geol.) A conglomerate or grit rock, consisting of rounded pebbles and sand firmly united together. [1913 Webster]

Note: This term, derived from the grauwacke of German miners, was formerly applied in geology to different grits and slates of the Silurian series; but it is now seldom used. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • graywacke — [grā′wak΄] n. [partial transl. of Ger grauwacke: see GRAY1 &] 1. a nonporous, dark colored sandstone containing angular particles of other rocks 2. a fine grained conglomerate resembling sandstone …   English World dictionary

  • graywacke — noun Etymology: partial translation of German Grauwacke Date: 1811 a coarse usually dark gray sandstone or fine grained conglomerate composed of firmly cemented fragments (as of quartz or feldspar) …   New Collegiate Dictionary

  • graywacke — /gray wak , wak euh/, n. Geol. a dark gray coarse grained wacke. Also, greywacke. [1805 15; partly trans., partly adapted from G Grauwache; see WACKE] * * * or dirty sandstone Sedimentary rock composed of sand sized grains in a fine grained clay… …   Universalium

  • graywacke — n. (Geology) coarse grained wacke of dark gray color …   English contemporary dictionary

  • graywacke — noun US spelling of greywacke …   English new terms dictionary

  • graywacke — gray·wacke …   English syllables

  • graywacke — US var. of GREYWACKE …   Useful english dictionary

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