Found 1 items, similar to Graywacke.
English → English (gcide) Definition: 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]