1) Metamorphic rock
Found on
https://www.crosswordclues.com/clue/fruchtschiefer
Fruchtschiefer is a local variety of contact metamorphic rock that is derived from argillite. == Formation and mineral content == Fruchtschiefer is formed under very low pressure (low grade metamorphic rock) and temperatures of ca. 500 °C. At these temperatures cordierite grows to the size of grains of corn, which is where its name comes from; Fr...
Found on
http://en.wikipedia.org/wiki/Fruchtschiefer
No exact match found.
