greywacke
1Greywacke — (German grauwacke , signifying a grey, earthy rock) is a variety of sandstone generally characterized by its hardness, dark color, and poorly sorted, angular grains of quartz, feldspar, and small rock fragments set in a compact, clay fine matrix …
2greywacke-slate — greywacke slateˈ noun A fine grained fissile greywacke • • • Main Entry: ↑greywacke …
3Greywacke zone — The greywacke zone is a band of Paleozoic sedimentary rocks in the Austrian Alps. The zone is part of the Austroalpine nappes.Mesozoic limestones crop out north of the greywacke zone, forming the Northern Calcareous Alps. South of the zone… …
4greywacke — /gray wak , wak euh/, n. graywacke. * * * …
5greywacke — n. (Geology) coarse grained wacke of dark grey color …
6greywacke — [ greɪwakə] (US graywacke) noun Geology a dark coarse grained sandstone containing more than 15 per cent clay. Origin C18 (as grauwacke): from Ger. Grauwacke, from grau grey + wacke …
7greywacke — /ˈgreɪwækə/ (say graywakuh) noun a dark coloured sandstone or grit, containing fragments of various rocks, such as slate or schist. {half translation, half adoption of German Grauwache. See wacke} …
8greywacke — n. coarse grained sandstone …
9greywacke — n. (US graywacke) Geol. a dark and coarse grained sandstone, usu. with an admixture of clay. Etymology: Anglicized f. G Grauwacke f. grau grey: see WACKE …
10Torlesse Greywacke — is a type of sedimentary rock. It is a hard and rather drab grey sandstone that is predominantly found in New Zealand though it is found elsewhere in the world as well. LocationTorlesse Greywacke is found east of the Alpine Fault in the Southern… …