schalstein

noun schal·stein \ˈshälˌs(h)tīn\

Definition of schalstein

plural

-s

  1. :  a slaty rock formed by the compression and metamorphism of basaltic or andesitic tuff or lava :  slaty greenstone

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Origin and Etymology of schalstein

German, from schale husk, shell (from Old High German scala) + stein stone, from Old High German — more at scale, stone


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